Do your own adventure, go everywhere you can. The traffic is tough, the hills, the track crossings, the trollies and the people make the city one of the gnarliest/ best riding destinations on the planet. Hit the Wharf and EMB areas for some flatter stuff, the Mission is next up the scale, then North Beach and the Haight. You're gonna walk the hills and be scared $hitless on the down hills. It's all what makes it THE riding city of cities IMHO! I don't run brakes usually, but run both in that city. Good Luck.