"....but I don't know how much the Hell's Angels paid."

I suspect they paid well. Friend was telling me that his band once for a short time was the favoured party band for a certain bike gang in Windsor, Ontario, after accepting a very high-paying gig to play for the "annual banquet" of a "bowling club" that turned out to be called Satan's Choice. The money was great but the gigs were VERY scary. The band finally had to break up to get out of it.