Dude that looks like a lot of fun!
I do not think the US has a very large scooter scene. There are some niche pockets, like the guys swapping GY6 150cc engines into the Ruckus chassis, but generally speaking we don't see a lot of scooters -- and we're smack in the middle of a metropolitan area where scooters are ideal for getting around town.
A couple years ago I bought a 1984 Yamaha Riva 180 and loved it. Most of what I see (and I don't see much) is 50cc stuff.
My brother has a 200cc Vespa but I get the feeling those are more lifestyle purchases that don't get ridden very much. It's the Ferrari of scooters, as they say.
