Yes, I went to bartending school after I graduated from college. When I didn’t get any job interviews, and my meager savings were drying up I needed a quick solution to make money for the rent. Five days later and $495 lighter, I graduated bartending school. I never poured a drink – I found a programming job the same week I was supposed to start bartending at a golf club.
People are always looking to have their cars washed and detailed. You could be a mobile car washer and detailer without having a permanent location. Reach out to people you know or make some flyers and put it in your neighbors' mailboxes. If you want to get serious about it, prop up a one-page website or give out business cards. You can make money quickly doing this.