Opera and Crimson - Opera is the Siamese twin of Crimson, a more live-music-oriented hangout next door. If sipping fancy cocktails in an elevated atmosphere isn’t your gig, let your hair down during one of the many concerts behind the wall. Otherwise, enjoy the dim, swanky décor and well-dressed, good-looking crowd of Los Angeles nightlife adventurers who don’t back away from the extensive line by the door.