I've only heard the term jack shack used for massage parlors where happy endings are possible (but not FS).
This is the first I've ever heard of this being a featured extra at a strip club. My gut feeling is, if you asked for this at most no-contact clubs, the answer would be no. I'd be worried a dancer at one of those clubs would rat you out to the bouncers for even asking. I would think a general extras dancer would be happy to let you be the one risking carpal tunnel. If you are trying to save money over a conventional HJ, iffy, maybe if you go when the club is slow. Or, try a club with both extras and non-extras dancers. The non-extras dancers might be down for this, for a smaller tip than what's expected for a conventional HJ.