ON THE ROCKS is Denver’s very own Modern Rat Pack Quartet! These four handsome gents bring you the best of the Rat Pack sound in a handsomely harmonic and polished package. With vocal stylings ranging from Frank Sinatra to Rascal Flatts, On the Rocks delivers sounds as classic as your favorite gin martini… and just as spirited. BOOKING NOW! Contact us TODAY to bring these handsome gents to your event!