Been going there for over 15 years now. It's a local dive, really, not exactly a flashy place. More like a place where you get comfortable. Plenty of beers on tap, Fish and chips with barely any batter, mostly fish. A place to go with friends you aren't interested in impressing, just hanging out for a few hours.
Best fish and chips around and cool pub
I spent the week in San Mateo for work this summer and almost every day, I'd walk down to the Swingin Door for some seafood and margaritas. Can't recommend them enough. Bartenders were friendly, food was great, ambiance was great. Months after that work trip I still have fond memories of the Swingin Door. Will absolutely make a point to stop by next time I'm in Cali.
This is my favorite watering hole and fish and chips joint in the bay. You got to go down and check it out yourself it is most certainly worth the trip. I guarantee they do not disappoint. Whether it be great conversation great food or great drinks this is the place.