Bob, Hate to tell you this but the chanties are slim to none unless you can prove there is enough traffic to support a a sub forum. The Administrator doesn't base adding a new forum on popularity, but how many threads support the idea.
Currently he there are several requests for new forums.sub forums that have been submitted to him, few get implemented.
This is the official thread created by the Admin, if you can provide backup info to support your request, so much the better. There are separate threads asking for new forums that are not listed in the attached link.
Good luck.
//www.city-data.com/forum/about...al-forums.html