There's a theater, and there's the Psychic type Gym. Otherwise it's a bit of an...industrious sort of place? Lots of pencil pushers work at the Silph Company and the like, Silph puts out a lot of the technological things found in this world. They even make Pokeballs and these Gears we're using right now.

I would save a Kanto trip for until after you've explored a bit more of Johto, though. It's quite a different region.