A postcard shows the Rat Pack (from left Frank Sinatra, Dean Martin, Sammy Davis Jr., Peter Lawford and Joey Bishop) posing in front of a Sands Hotel marquee bearing their names. Their performances at the Sands during the 60s marked the golden age of the group. View photo »

All five members of the Rat Pack, from left, Peter Lawford, Frank Sinatra, Dean Martin, Sammy Davis Jr. and Joey Bishop, perform at the Sands Hotel in Las Vegas, Jan. 20, 1960. Their gigs were often improvised and when one member of the Rat Pack was scheduled to give a performance, other members would show up for an impromptu show. View photo »

The Rat Pack's Dean Martin and Frank Sinatra carry strike signs demanding "Free Broads" as apart of a gag during a show at the Sands' Copa room. Joey Bishop once commented on their image as womanizers, saying: "Do you believe these guys had to chase broads? They had to chase 'em away!" View photo »

A collection of spirits accompanies Dean Martin, Joey Bishop, and Frank Sinatra as they perform together at the Copa Room of the Sands hotel-casino in 1966. View photo »

Dean Martin (right) teases Sammy Davis Jr. during a 1960's performance. Dino would become famous for ridiculing his peers during his Celebrity Roasts, where he and a panel of famous friends would honor a celebrity with mercilessly funny insults. View photo »

Frank Sinatra sings during one of his countless performances in the Sands' Copa Room. His performances were immortalized in the 1966 album "Sinatra at the Sands." View photo »

Dean Martin smiles for the cameras in this photo taken in March 1982. Martin first performed in Las Vegas in 1949 at the Flamingo hotel with Jerry Lewis. He continued performing there for 40 years until his final Vegas shows at Ballys in 1989. View photo »

Sammy Davis Jr. performs in front of a packed crowed at the Sands' Copa Room during the 1960's. View photo »

Comedian Joey Bishop poses for cameras after a stand-up performance at the Plaza. Bishop was the last surviving member of the Rat Pack, until his death on Oct. 17 2007. (UNLV Special Collections) View photo »

Rat Pack singer Peter Lawford, left, poses with then presidential candidate, John F. Kennedy. Lawford was married to Kennedy's sister, Patricia Kennedy Lawford, and, along with the Rat Pack, campaigned heavily for Kennedy in 1960. View photo »

Doris Day, left, Frank Sinatra and Lauren Bacall attend a show at the Sands hotel-casino on Sept. 15, 1966. Bacall and Sinatra were involved in a relationship after the death of Bacall's ex-husband Humphrey Bogart. Sinatra proposed to Bacall but he cut the romance short after the media made the engagement public. View photo »

Frank Sinatra and Dean Martin sing a duet together during a 1960s performance in the Sands' Copa Room. The Rat Pack was born when Sinatra joined Martin onstage to sing "Sleep Warm" at the Sands on Jan. 20, 1960. View photo »

The Sands celebrates its 11th anniversary with comedian Danny Thomas and actress Lucielle Ball, back, Sands manager Jack Entratter, Rat Pack members, from left, Dean Martin, Sammy Davis Jr., Frank Sinatra, and comedian Gary Morton. View photo »

The Rat Pack, from left, Dean Martin, Frank Sinatra, Joey Bishop, Sammy Davis Jr. at one of their many performances together on the stage of the Sands' Copa Room during the 1960s. View photo »

Sands general manager Jack Entratter, left, waits backstage with rat pack members Dean Martin, Frank Sinatra and Joey Bishop before a performance at the Sand's Copa room View photo »

Dean Martin makes his debut in the Sands Copa Room on March 6, 1957. A year removed from his separation with comedian Jerry Lewis, many doubted Dino's ability to have a successful solo career. Despite the skepticism actresses Lucille Ball and Debbie Reynolds, comedian Jack Benny and Jack Entratter attended the act and can be seen in the audience. View photo »

Dean Martin and Frank Sinatra perform together and drink together at December 13, 1983 performance. That same month Sinatra was named as a recipient of the Kennedy Center Honors, a prestigious honor given to American performing artists. View photo »

Rat Pack members Peter Lawford and Sammy Davis Jr. do a number together for a performance that occurred sometime during the 1960s. The duo collaborated numerous times, most notably co-producing and co-starring in the movies "Salt and Pepper" and its sequel "One More Time." View photo »

Frank Sinatra sings onstage at Caesars Palace during a June 1974 performance. Sinatra began performing at Caesars in 1968, after Howard Hughes' 1967 purchase of the Sands lead to a violent dispute with Sands hotel management over Sinatra's credit at the casino. View photo »

Sammy Davis Jr. snaps his fingers during one of his countless performances in Las Vegas. The city honored Sammy on Feb. 15, 2007 with his own star on The Las Vegas Walk of Stars. (Sun photo by Lee Zaichick) View photo »

Dean Martin performs on stage with Gail Martin in the Sands Copa Room on August 1967. Gail was the daughter of Dino and his first wife Betty MacDonald. She followed her fathers footsteps and entered into the entertainment industry. View photo »

Dean Martin looks on as Frank Sinatra sings a number during one of the Rat Pack's performances at the Sands' Copa Room. After Sinatra left the Sands, Martin continued to play at the Copa Room by himself, until becoming a longtime headliner at the MGM Grand. View photo »

Sammy Davis Jr. roars with laughter as he and fellow Rat Pack members Dean Martin, Frank Sinatra and Joey Bishop perform together at the Sands' Copa Room during the 1960s. View photo »

Sammy Davis Jr. gives an energetic performance at the Sands Copa Room. Despite losing an eye and nearly losing his life as a result of a 1954 car accident, Davis continued entertaining until the early 90s. View photo »

Comedian Joey Bishop speaks to guests during the taping of his talk show "The Joey Bishop Show". Bishop was regarded as one of the more inconspicuous members of the Rat Pack, but he was highly respected within the group. Frank Sinatra went so far as to call Bishop "the Hub of the Big Wheel." View photo »

Peter Lawford performs at the Copa Room in the Sands Hotel during the 1960s. Seated in the front rows of the star-studded audience are fellow Rat Pack members Sammy Davis Jr. and Dean Martin, actor Milton Bearle, actresses Marilyn Monroe and Elizabeth Taylor, and singer Eddie Fisher. View photo »

A young Frank Sinatra snaps his fingers while performing on stage in this undated photo. Sinatra's ties in Las Vegas go back to 1941 when he appeared in the film "Las Vegas Nights" as an uncredited singer in the Tommy Dorsey Orchestra. His Vegas stage debut did not occur until 1951. View photo »