What’s your radius? Near BART? Not too many places serving food after midnight unfortunately.
I’m not sure if the hours in their Instagram are accurate, and it is a bit like fast food, but I enjoyed my shrimp falafel sandwich at Shrimp Falafel Mix, which when I went was a food truck but now is a brick and mortar called Cairo Station Cafe in Uptown near the Fox Theater open late. I went there once after they became a brick and mortar but forgot what I had there. Not sure what the drink situation is there but there are several bars around that part of Uptown including Cafe van Kleef.
In Oakland Chinatown there is longstanding restaurant New Gold Medal, open until 3am, and a good place for some late night Chinese food like congee and beef ho fun.
Also in Oakland serving food past midnight is Dan Sung Sa on Telegraph aka Porno Palace. I haven’t been in forever. Korean food that’s good with drinks - corn with cheese, Korean fried chicken, etc. I don’t think they have cocktails nor hard liquor, but definitely soju and beer.
In SF there is classic burrito spot El Farolito on 24th and Mission which is open until 4am Saturdays and Sundays. Only beers there though. There is also a newish El Farolito open in North Beach that closes at 2am. Also near North Beach on Broadway is Taishan Cuisine, which opens until 3am. I’ve only been once and had the dry fish w/ pork meat rice, which was enough for 2-3 people. Good but a little too much dried fish. I should have gotten myself a rice plate or a bowl of congee. They also have dim sum and hot pot. No cocktails there either though, but there several bars open late nearby in North Beach and Chinatown, among them Vesuvio Cafe, Devil’s Acre, Specs’ Twelve Adler Museum Cafe, and Li Po Lounge, home of the Chinese Mai Tai.
ETA: rice with dry fish w/pork meat rice at Taishan Cuisine
One place that might fit the bill and has good cocktails is Horsefeather on Divisadero in NoPa, SF. Very good burger and fried chicken. Open until 2am on Saturday, looks like the kitchen closes at 1:30am.
ETA: food and drink at Horsefeather
There’s also the Grubstake in SF, which is kind of a diner with some Portuguese dishes like caldo verde. It’s fine in a pinch. One of the few places open until 4am on Saturday.
And finally another option that I sometimes end up doing late night is a slice or two from Seniore’s in the Lower Haight (open until 1:30am on Saturdays), taken to go and eaten down the street at Toronado with a beer or two.
