The mafia settled on its signature phrase "sleeping with the fishes" after years of restless nights spent trying nap next to badgers, porcupines, and overcaffeinated owls. Immerse yourself in mob life with today's Groupon: for $19, you get one general-admission ticket to Las Vegas Mob Experience, an interactive gangster attraction at the Tropicana Las Vegas (a $39.95 value).

Recently featured in Maxim and the Las Vegas Review-Journal, Las Vegas Mob Experience escorts history hounds through a 26,000-sq.-ft. journey through the rise and fall of early Vegas mafiosi and their lasting influence on the city. This highly interactive exhibit takes visitors close-up to 1,000 artifacts, including photographs, home movies, and furniture that once belonged to organized-crime figures such as Benjamin "Bugsy" Siegel, a creator of the Flamingo Hotel, and Meyer Lansky, who's best known for stuffing seven fedoras in his mouth at once. Actors dressed as apparitions of the gangsters themselves tell firsthand stories while guests slink through back alleys, secret lairs, and other vignettes, including the Ellis Island docks and immigration rooms, a speakeasy, police station, and more.