Winter Birthday Ideas + Fun Things to Do

Hello! My birthday is at the end of January so I'm trying to think of some fun things to do for my birthday. I haven't really had a whole lot of opportunity to celebrate my birthday in the past, and when it comes to fun things around the city I feel like I usually stick to the same few things and I wanna change things up. I also need more ideas for things to do around the city in general.

Things I usually like to do around the city is Golden Gate Park (and parks in general, but with a January birthday outside isnt much an option), Cal Academy, concerts, thrifting, good food, spa days.

I'm not looking for just a restaurant a fun activity to do.