“The Rat Pack Lounge,” a musical written by James Hinderman and Ray Roderick, brings back memories of the 1960s when Frank Sinatra, Dean Martin, Sammy Davis, Jr. and, usually, a fourth or fifth entertainer (Peter Lawford, Joey Bishop), packed ‘em in at the Sands Hotel, Las Vegas.

Now playing at The Pines Dinner Theatre, Allentown, through Aug. 19, “The Rat Pack Lounge” is from every aspect the best Pines’ production so far this season.

Set in a rundown cocktail lounge on the wrong end of the Las Vegas Strip, owner Vic Candelino (James E. Oflat) is about to do himself in because, as he explains it, “My life is crap.”

In the meantime, up in heaven, God, the divine Chairman of the Board, orders Sinatra to go back to earth and “inhabit” a Texas tycoon, William Saunders (Daniel Pippert), to help Vic by fulfilling a promise made but never kept.

Tagging along are Dino, who “becomes” Saunders’ chauffer, Jeorge Rodrigues (Michael Joseph), and Sammy, who lands in the body of bartender Bobby Goldberg (Cory Ingraham).

The cast includes Saunders’ officious secretary Katherine (Karis Gallant), not unlike Angie Dickinson (as with Shirley MacLaine a sometimes Rat Pack gal pal), whose body is occupied by an angel.

The clever plot lets the famous entertainers come “back to life” to act and sing on stage in a way that allows the audience to buy into to their famous identities. No need for look-alikes or impersonations. They just take over the bodies of live people.

Director Amber Blatt has assembled a remarkable cast that during the July 7 performance seen for this review, exhibited the vocal quality, comic-timing and stage prowess rivaling professional bar lounge performers.

The multi-talented Ingraham brings the house down with his impressions of Louis Armstrong and Katharine Hepburn, and is no slouch singing “What Kind of Fool Am I.”

Pippert’s rendition of “I Did It My Way” at the end of Act One was a dramatic “Wow!”

Musically, it is hard to beat John Glaudini’s arrangements of such Sinatra and Dino hits as “Nice ‘N’ Easy,” “Come Fly With Me,” “Volare,” “Young At Heart.” and “I Did It My Way.”

Once again, Pines music director Stacy Bechtel creates an upbeat soundtrack as accompaniment for the singers that consists of various instruments that she plays, records as separate tracks and then mixes to create the finished “orchestra.”

Since the lounge is central to the musical’s story, the set design needs to be bold. Oliver Blatt’s set, framed in neon lights, is exactly that.

Tickets: Pines Dinner Theatre box office, 448 N. 17th St., Allentown; pinesdinnertheatre.com; 610-433-2333