Hi Liquid.
Now, I can post here from genuine previous experience. The girls your fella is likely to see on this stag do are going to bleed him dry for about �100, talk to him for approximately 30 seconds, and then get their kit off in exactly 3 minutes whilst thinking about what they'll be having for tea that evening and how much washing their is still to do at home.
The rule of licenced lapdancing clubs is no touching or you are asked to leave, so believe me when I tell you that the whole experience is about as sexy as getting your bikini line waxed - everything is out for all to see but it's the wrong context.
I suspect that you are more upset about the fact that he is refusing to acknowledge your feelings about this issue, which raises difficult questions in your relationship.
Is he going just to be one of the lads? He can't really stand outside and wait for them all night can he?
Believe me, there's very little that's sexy about a lapdancer. They all wear wigs anyway chick.