Dang I live in the suburbs. I can go to football games, play d&d, go to concerts, hang out at brewpubs, etc. The same things other Americans do to amuse themselves :)
Plus I can go rock climbing, boating on thousands of different lakes, canoeing for days, camping, hunting, stargazing, etc. It's an amazing place to live.
Unusually, its typically leaving town to see other things in the midwest, maybe going to Chicago or Fort Wayne. Although I find Fort Wayne depressingly car dependent from what I've seen, so I prefer Chicago.
St Louis actually has a music scene so I go to see live music, especially festivals nearby or 1/2 states away. Regular bands, opera, symphony, jazz, musicals, etc. Kansas City is nearby enough that I can pop over if I'm excited for a big act. Chicago is a train ride away.
Tabletop rpgs or video games. I'm moving away from crunchy games like D&D towards narrative focused stuff. MoTW, Dungeon World, Wanderhome, one-page RPGs.
I'm a weird coffee person so I have a booklet where I rate coffees and I brew at home.
Cooking is a hobby of mine that I quite enjoy, especially when I invite friends over to help.