Atomic Liquors is the oldest bar in Las Vegas though it's undergone a lot of renovation in recent years. Originally founded by Joe & Stella Sobchik in 1952, it was named for a time when customers watched atomic blasts from the roof. Its sign can be seen in Casino and The Hangover among other films. Featuring décor that includes Geiger counters and blast-themed drinks, this bar is not actually hazardous to your health, unless you stay too long. After all, there's no last call in Las Vegas.