I could hazard a guess and say, 20 or more? There are weirdos who've seen the Rocky Horror Show hundreds (and hundreds) of times. Both on screen and in live on-stage format with shitty actors.
Heh, pretty sure I got that beat.
You know why people followed them from show to show when they were touring? First of all, they had 100s of tunes they could and would pull out. Second, they'd play the first part with lyrics, go into a (an often times long) jam, and at some point finally come back and finish it up. In other words each tune was played differently from night to night if it was even played more than once at any given 3 or four night stand, and every show had a different setlist. You don't want to miss one.