What platform you playing on? It's definitely a ghost town here on PC. More likely because it's bugged as ****. I'll join Park then have my friend join at the same time, but we still won't see each other, let alone anybody else. Just an empty park.
I feel like these things are instance based or something. That's not right. You can play with your friends, you just have to go to 'Play with Friends' instead and join them from there. But as of now, can't just hop on Park and play randoms because it's a ghost town.
I guess I gotta wait til the servers are done crappin out