Street on LetMeJizz
Most of what passes for a spontaneous sidewalk pickup is written long before anyone says a word. The cash-for-sex offers and shocked reactions are performances, the public setting dressed up to feel unplanned. What people actually want from it is the outdoor risk and the stranger angle, staged or not.
205 street videos here, all HD and all free. New ones go up daily, so check back if you don't find your scene first time around.