I was subbing for a top 40/dance/rock band last night at the typical neighborhood bar gig last night and was talking to the sit-in harmonica player/singer. He was telling me he had a band and asked if we were in the studio. I explained that I was a sub but the band might be working on something. He went on to tell me that liked to get his band in the studio 3 hours a week so they'll be ready in case a gig pops up. I guess they're technically inside a rehearsal studio...I've just never heard it used that way.