I went to a business lunch the other day with a group that inlcuded both senior and junior colleagues, male and female at a pub in the financial district. Kehnay ko it was a reputable place, but the waitresses were wearing plunging necklines that revealed an abundance of cleavage and these short, short skirts (imagine hiked up Catholic schoolgirl skirts) - which was their uniform. I'd lay odds that the attire of the pub waitresses could've given the Hooter girl outfits a run for their money.
That being said, the "social acceptability" of going to the pub (I work in a very PC workplace - so they're very conscious of where we socialize during work hours) versus Hooters IMO is very different. It's not what the women are wearing - but instead the "dining experience" that Hooters' markets itself on that makes it taboo - but this is just my opinion...