I would just tell the truth and put bar work, bar attendant or something like that. You don't have to mention the topless bit.
yep, thats what i was going to say. its still work/experience, so no reason it shouldnt be on your resume!

all the references on my resume aren't even valid anymore- i have the mobile number of one boss.. but the rest i know for a fact dont work at the job anymore... and one job i didnt put a reference at all, as i has a fall-out with the manager(hence why i left) but i still included the job, as i was there for 6 months!