Personally the only bachelorette party I've been to didn't even have any strippers or anything like that. It did involve a lot of drunken dancing though.
This might actually sound unusual to anyone who really knows me considering that I'm unattached and have been leading an extremely "active" private life since highschool... On the other hand a friend of mine went to one where there were something like 20 girls there, and they'd booked four male strippers. There was some light "contact" with hands and apparently they ended the whole routine by jerking off onto the bridesmaid. I'm not certain that part is true just because I don't think I've spoken to anyone else that was there about it, but I've heard similar stories from friends, regardless of it being a bachelorette party.
But that aside, I have actually seen plenty of male strippers at the odd party, but mostly at clubs. I do occasionally go to this one club in my area that's really well-run and quite reputable in spite of sometimes being very
risqué as far as stripping goes. Very usually they'll strip down to nothing , which is one of the main draws (pretty much why I go there on occasion when I'm bored XD), so in addition to the usual criteria of the guys being cute and well-toned, you can reliably expect them to be packing some serious equipment.
One thing about this place is that a pretty big chunk of their clientèle are gay guys, so on regular nights women are maybe half the audience. I pretty much go on the ladies' nights that they have once or twice a week, which is basically 1/2-off on admission and drinks for any women (and convincing drag queens, I guess XD). As far as I can tell, the shows are wilder; everyone they've got on stage is guaranteed to either start naked, or get naked fast. I think this has got to do with how this club isn't terribly far from the local university, and crowds on ladies' night tend to be bored/horny college girls like me with access to cheap drinks, so you can imagine what the audience is like. I figure bringing out their hottest/biggest guys in force is just one more way to bring in a ton of business in one night... But yeah, in terms of size, well, they've actually got quite a few dancers, and as I've said, they prefer boys with big cocks. From what I've seen in terms of penis size, they range from a few guys who are like average/above average, to big, to, well, huge. Seriously, they've got a couple guys that are big to the point where their dicks still hang noticeably when fully hard (which they always are during nude routines, part of the draw, really XD). I always find it a little funny whenever one of these really well hung guys comes out in a gstring that he obviously doesn't fit in even though he's still soft. Ah well, it's going to come off anyway.
But really, having their dicks on display while dancing/pole dancing is about as wild as it gets under normal circumstances. However, a friend did take me to a private party in their VIP lounge once, and one of their guys ended his routine by beating off into the audience. He certainly got points for distance, I can tell you.
But like I've said, this is fairly well-run, and they have a good screening process from what I've learned.
So yeah, I guess what I tend to expect/look for with male strippers is a hot greased up guy with a big hard dick on display. XD Funny thing about that is that I know two different guys that are definitely bigger than any stripper I've seen, but then again they don't spend much time showing how limber they are under stage lights... Anyway, I'm not naming actual sizes here because the biggest ones are really that unbelievable, and speaking from experience, take some serious practice to handle in a bedroom situation.