Here Kitty Kitty Vice Den is a playfully sinful speakeasy in Las Vegas that blends prohibition-era cocktails with Singaporean influences. Guests must whisper the secret password "meow" to gain entry to this hidden fusion bar. With its cheeky cat-themed concept and East-meets-West drink menu, this highly-rated venue (4.3/5 stars) offers a uniquely Vegas take on the classic speakeasy experience.