My friend briefly ran a club night called "Black sABBAth" at a local DIY space. They only played two bands, which you can probably guess, and luckily they have enough hits between them to fill a decent set. It was a good time, considering it was mostly a space to get out of your head while some music played.
Back on topic, I'm actually a one-man Mountain Goats tribute called The Best Ever Mountain Goats Tribute Out Of Doncaster which I sometimes take to the local open mics to generally bemused reactions (unless there's another MG fan attending, in which case they act like a paleontologist finding a live Triceratops wandering around their local dog field). It's not a money spinner, but a man has to have a hobby and I believe that getting paid for all of your gigs isn't healthy for the soul.