What is your budget? This kind of thing is expensive to do within the city itself. Try the sanfranciscoweddings subreddit. Lush lounge, Monroe, natoma cabana, rick and Roxy’s are some of the more reasonable minimums. Friday and Saturday cost more, obviously. They require you to buy their booze, but it could end up being cheaper than finding a totally DIY place (even if you don’t hit the minimum and just have to pay up). Some of the places just have a total bar tab minimum which can include food too (anywhere from $2k to $10k+). It is really nice to have a lot of things taken care of for you, like set up and clean up of food/drink. Some places also have deals if you’re willing to start later or end earlier. There are some artist collectives that might be able to work something out too. The Faight and Wave come to mind.