how about roman centurions? bits of bare flesh under 'togas' of bed sheets always go down well with the ladies! you can buy sme helmets, swords and breast plates fairly cheaply from most joke/fancy dress shops and the bed sheets would be free from your hotel!
Superheroes. I'm telling you, if I saw Batman and Superman walking down the street I'd be pretty impressed. Though I can't think of 8 superheroes myself ..
Just came back from a w/end of fancy dress at butlins and some of the guys were fab looking, us girls went round as many as we could taking pics, there were smurfs, a.team, bill and ben!,topgun which was very sexy indeed, punks, officer and gentleman, to me your best bet to get the ladies were topgun all-in-one suit,glasses etc just watch the film you'll get the idea hope this helps.