We have a lockable bike shed at work, but the stands are those crappy butterfly type ones. The only reason I'm willing to lock my bike to one is because I work at a uni, and the bike sheds are staff only, so the rest of the campus has lots of Sheffield stands with poorly locked bikes attached. Bike thieves could have a field day without having to break in to the bike shed.
If anyone has any tips on locking your bike to a butterfly stand, I'd be interested in hearing them. I currently lock my front wheel to the stand with my D lock and then lock the frame and the back wheel with a cable lock. I can't turn my bike around because the basket makes it front heavy so it topples over if the front wheel isn't in the stand.