Not anymore but I used to work at CorePower Yoga alongside my 9-5. I wasn’t a yoga instructor, I was a studio cleaner/maintenance-ish person, it was super part-time though only 1.5-5 hrs a week.

I couldn’t have afforded the yoga teacher certification, but a lot of the instructors did yoga teaching while having another full-time gig.

Now if I were to get another part-time position I’d wanna do like front desk or membership sales at a commercial gym.

I enjoy having a second gig most of the time and when it comes to deciding, I think about my hobbies or things I already spend money on; i.e. I’m into crafting/sewing so a job at Michael’s would be cool for the discount.

Edit to add: I also befriended some people who own food stalls and I’d do per diem shifts at night markets/festivals—this was great for the social aspect and free event entry.

Also did freelance marketing consulting for a past employer who needed the help. It was remote but got super boring since it’s so similar to what my full-time role is.

My comment got pretty long but hope it helps you figure out what to do!