i mean what is it that you want to do? there is a pretty solid club scene in the city, especially if you are 21+. theres all the goofy touristy stuff, like the bridge and pier 39 and chinatown, which is actually kinda cool if you have never been there before. also if you like music check venues for shows you might want to see. some of my favorite spots are great american music hall, the fillmore, slims, popscene, bottom of the hill. those are all good place to see shows.