Yeah, seconding Dragon*Con. I think multi-genre cons tend to have a bit older crowd -- and there are tracks for both anime and games at Dragon*Con, so a cosplay like that wouldn't be out of place. At D*C I've definitely seen just pasties and a thong, body paint and not much else, or strategically placed caution tape or duct tape, after 8 or 9pm and into the wee morning hours (one of the nice things about a con across several hotels and not a convention center).
Upcoming costumes - Dragon*Con 2013:
Steampunk Tinkerbell (original concept) - 100%
River Song - Day of the Moon dress (Doctor Who) - 100%, adding props
Samantha Winchester - Winchester Sisters (Supernatural genderswap) - 100%, adding props
Abaddon - As Time Goes By dress (Supernatural) - 90%