All who know me know that Frankie's is my go to bar when I'm home in Vegas.
On the outside, I'll be honest, the place looks way small and a little dated. But you walk in and get put into a dark Hawaiian paradise. If you are into original monster movies or rockabilly sensibility then you adore this place.
They have a special drink menu, they list potency by skull ratings from 1 to 5. Be warned, 5 skulls is no joke. It will put you on your ass. (They have beer and other drinks as well.) Recently I had a Bloody Mary and it was probably the best I've had in Vegas, aside from my house.
Just keep in mind first Fridays, Fridays, and Saturdays can get super packed.