New York City – On2
Philadelphia – mostly on1, but also on2. Just cross the border to NJ and they dance on2.
Vancouver Canada is about 30% cuban 69.9% linear (mostly on1) and 0.1% Cali style (me and my friend lol)
Midwest here, it’s all on1 but there are classes for both on1 and on2.
It is mostly linear style but a lot of Mexicans and Colombians dance cumbia (circular style?) to every salsa song.
Happens a lot in the south too. In Texas, more Cumbia is played at socials than other places but you’ll still see Cumbia danced to salsa music by Mexicans and Colombians.
DC area. I haven’t been social dancing in some time but when I did go, I’d say it was split: 60/30/10 (on1/on2/cuban).
Los Angeles. The social dancing at clubs seems to be all on1. There is probably on2 somewhere but I haven’t run into it yet.
I’m in the Midwest. Mostly on1 however if you want to be special you’ll learn on2… if you’re talking about studio learners. Different story if you learned at home and for example you’re doing the home grown salsa-as-cumbia thing or PR, depending on where “your” family is from.