"Streetcar suburb" is correct. The Outer Sunset formed around the old "Carville" site, and the district's development was mostly complete by the '50s. But the blocks of row houses on a grid are such an old planning concept that it's almost unrecognizable when compared with late-20th century suburbs. The hills are a bit too steep and the streets a bit too busy for a young child to safely bike around or play in. On the other hand, skaters enjoy the slopes and curb cuts and often film there.