Some Bounty Hunter is going to invent formal wear that does not exist in Star Wars to put it on a droid just to troll?
Well Bioware is certainly successfully trolling.
Well, what do you know? There is everything in Star Wars. Even tux-wearing droids. Check this out: http://starwars.wikia.com/wiki/L-O53
He comes from SWG. He's a matchmaker droid, turns out.
Also there is an Ortolan in a tux in Clone Wars... cute. I want one!