Here's an interesting thing: what's the market for teaching adult classes - like rockclimbing, language, guitar, dance, belly dancing, cooking or whatnot?
I found some information in Simply Map.
Easiest thing: go to variables (left side of the screen), and click search.
I just typed lessons below, but you could search guitar/music lessons, etc.
The official category words are Education Hobbies (trust me) and "Recreational Lessons."
Simply Map Tutorial Here.