Avoid London, Its full of young looking teens wanting more than just messy fun and dirty old men. Leeds, Manchester and Edinburgh are the best places for messy wam and gunge action
lol NYC? No way. I think Philly and DC would be better than NYC. Also LA and San Diego. Then Boston.
Almost nobody in NYC can host and most of the active locals seem to have a personality disorder. There's not many actual active users who live in the city. Theres probably more in Nj and the Long Island suburbs and they're not necessarily all closeby.
If you check the user data (been here a long time) London has a multiple of the users anywhere else does. Regional British cities are equivalent to or better than major US cities for users, out of much smaller population so there's more per area or per capita.
Theres also Australia (really, just a few cities) and Taiwan for wammers. Continental Europe less so.