Tramp Stamp Granny's is a piano bar in Los Angeles that serves cocktails and hosts live music. Performers sing show tunes and pop songs at the piano while guests sing along. On Thursday Disney Night, the room thins out around 8:30 p.m., making it easy to pick a seat, and the bartender joins the performance for a duet. On Fridays, the bar stays crowded until midnight or 1 a.m.