If you go to your campground and press "A" on the campfire (When the fire is lit) you start square dancing. This is a pretty fun and silly new thing in the update that I just wanted to share with people!
This is one of the first things I tried when I visited! I love how interactive the campground is, and Harvey has some really great dialogue. He reminds me of Bob Ross lol.
I loved it so much, back when I discovered it, that I thought if I built the firepit in my town I could dance with my villagers. However, you cannot dance at your own firepit. Only Harv's