My SF story: Chinatown, near the convention center. My wife wanted me to pick some stuff up while I was there. I had been there by day, seemed perfectly reasonable. I get done with the trade show, head over there near closing time to get what she wanted (perishable, so I left it to the last minute) and coming back I realized the character had changed considerably and it was a place I didn't want to be. I hadn't gotten a car because the hassles of parking made it a negative to me.