I always wanted to work for myself, or with people I like. I mean by that, having a company with somebody I already know, no boss to tell me what to do or not to do.
I would have some kind of catering place, but where you also can eat. A restaurant traiteur. I would also make it really affordable, so that anybody can come.
Also serve some teas, juices, coffees and cookies/pies/cakes.
A place where students can come during their loose hours... something like that.