Most cities speak bokmål. Nynorsk is spoken in more rural areas. The biggest "nynorsk club" I would say is Sogndal. Sogndal is a small community with only like 2000 inhabitants and the main industries there are fruit, jam and fruit juice production in addition to tourism. Despite this, they've produced several quite famous players like Eirik Bakke and Tore Andrè Flo. They got relegated to first division last year, but usually bounce up and down between the Elite and first divisions, very impressive considering the small community.
Sogndal is located in western Norway, in a region called "Sogn og Fjordane", on the bank of Sognefjorden, one of the most famous fjords in Norway.
It's north of Bergen, south of Aalesund.