Club 217, Santa Monica
It's a small, dark club with a great selection of music. They have a little stage and a dance floor. It is just a very long, rectangular bar. They have couches on one side (unless you get there REALLY early, they're impossible to snag) and the long bar on the other side with a little walkway in the middle. Cover charge is usually about US$7-10.
Dress Code: Hollywood attire - nicer slacks and button-up shirts for men. Cute dresses/skirts/pants for women. Skimpier attire is perfectly acceptable. More cleavage the better!