Where is a good karaoke bar in downtown Indianapolis that does Saturday nights?

I'm throwing a bachelorette party for my friend on a Saturday evening, and I know we would like to go out in downtown Indy, but she specifically wants to have karaoke be part of the evening. I've found several places that seem to do karaoke on weeknights, or places furthr out of town, but we're trying to stay downtown b/c that's where we can get a hotel for several...any suggestions??