Do you mean those large frames sunglasses that look like something from that 70's show?
Actually if a bloke is dressed like that, I think it can look okay as long as he has "that look" himself, with the hair do and all, and there's not a group of them..Most look like the hipster morons but once in a while it looks good on the 30-35 age bloke. The retro look doesn't quite come off as good on the ladies though.