I agree, just find a girl and ask.
I used to do this all the time in Asia. If a gogo girl was wearing an outfit I liked, I'd ask her to take it with her when I barfined her.
And I'd have a bag of extra gear - the micro-bikinis, PVC, etc - in the room ready for them to try on.
Usually the only trouble I had was sometimes gogo girls would get lazy or wouldn't take the request seriously so I learnt to check they really had the outfit before we left the bar.
Back in the room, telling them it'll make you cum quicker pretty much always convinces them to put pretty much whatever you want on.
Keep the outfits clean and not too scary and they'll try them on.