The cosplayer known as Aqua will probably do an effective job of keeping diligent males from being productive as her cosplay of a stunning tan elf dancer and some sort of sultry succubus barely covers her body, the woman casually spreading her legs open and allowing passersby to stare at whatever they desire.
Aqua’s outfits might be difficult to surpass in terms of allure for competing cosplayers who aren’t eager about going fully nude (which is seemingly what would be needed to go beyond Aqua):