I've done the same thing for a while. The theme basically was every friday I would make one dish, mostly something "streetfood", but would go all anal about it, kind of like that Heston Blumenthal series "In search for perfection". I've made Ramen, Thai dishes, gumbo, ma po tofu, burritos, burgers you name it. I created a facebook page and on that I announced the dish I would serve that friday. It snowballed from 6 to 60 people a night. I was always guerrilla, never asked for permits and whatnot. Good fun, okay money. I'll probably start doing it again once my wfo is finished.