That happens more than one thinks it would. My understanding is that none of them are under a contractual obligation to appear. Instead, they pay Adonis for the right to appear (similar to a hair stylist or personal trainer who pays for the right to use the premises) and they keep the $ earned. Consequently, a dancer can decide not to show for any reason (he gets a better offer; it's raining; he's not feeling well; or he just isn't into it/us)