It has taken over my town as well. My town has around 50,000 people in it. There is this street over by me with a ton of decorative themed benches, including a Pokemon themed bench, and each of the benches is a pokestop. Every time I'm over there I see 100+ people walking around playing pokemon go as well as lures being everywhere on that street.
I've also taken over a few gyms in some of the most traveled parts of town and I've had people messaging me who I haven't talked to in awhile asking if it was me at those gyms.
There was also someone who was hit by a train today in my town and killed and the details haven't been released yet, but people were saying he was playing Pokemon Go. I don't know if this is true, but it's crazy to think that Pokemon Go may have killed someone in my town.