The harassment is spreading! Without University, you can't throw a genuine toga party and have everyone change instantly the moment they get there. There's probably a mod for it somewhere, but I don't know...
I found a sort of glitzy thing pretending to be a toga in a few colours for the ladies, and these dresses which look vaguely ancient and there's a few things in parsimonious for romanish stuff, but there's no togas for guys which don't use the university mesh, apart from the badly made slave toga here which uses a different body mesh as well. And you have to download the whole family. Oh, I just found a bunch of pretty garish outfits, none of which are proper togas. Got some soldiers here as well.
Personally I'd forget the toga party and have a massive garden party, just get aload of flamingos and put them outside in the garden with party stuff and maybe a pink dancefloor? Flamingo is the way to go imo.