PopUpAt was built to connect venues with vendors — pop-ups, markets, residencies, that sort of thing. The software works, and you're welcome to look around the rest of the site to see what it does.
It never really got off the ground, and the honest reason is that I'm terrible at marketing, and genuinely intimidated by it. I'd rather retire it properly than let it quietly rot.
So the whole thing is for sale, cheap, if you'd like to take it over — codebase, domain, the lot.