Charcoal for cooking on a grill is most frequent and normal. (Yes, I know charcoal briquettes are not pure coal, but some do contain coal as an additive).
Because of schooling and work, I’ve seen it burned in power plants and burned it myself in a laboratory setting (comparing bituminous to anthracite to others). My sister volunteers at a historical blacksmith shop, they have a couple different demonstration furnaces and one burns coal. There’s also a steam engine demonstrator that runs on coal, but they don’t fire that one up very often.
When I was a little kid, so young my memories are very hazy, i was taken to see the sod house my great grandma grew up in before it was torn down. They used coal for heating.