Let's define extras as ITC HJs or more, or anything OTC. LDKs don't count, nor does stick shifting. Nor do kissing, tit sucking or pussy fingering. .. this is about intentionally getting guys off for cash.
Obviously it varies by club and city. But be honest, if you walk into your favorite club, what percent of girls at least occasionally do extras? More or less than half?


A hand job is setting the bar low. In the Detroit clubs I visit, I think 99% will do hand jobs or more. BJ and FS are available from most dancers.
The question should probably be, What % of dancers will do extras for $X? As the dollars increase, the extras increase. For $1000, every bitch will be sucking and fucking.