In Manchester you have two main Clubs, MAWS, mentioned above, who meet at Walkden on a Monday night and the Mailed Fist who meet at Hyde on the 2nd and 4th Sundays of the month.
Both are good clubs. The Mailed Fist play a lot of Napoleonics and 7YW, but in 15mm and we use GdB. We also have a Fast play version for large games. Most of us can provide two or more armies, but we normally play two or three per side. Next meeting is on Sunday.
http://www.maws.org.uk/mailedfist/index.html
I am afraid this is slightly out of date as we do not meet at the festival theatre, but at an old scout hut off High St, actually Knivtn S, (Whatever that means). However its up the side of the Corner shop, just under halfway up High St, turn right at the Garages.
If you are interested, let me know.
I know there are a lot of little groups of two or three players who meet at their own houses, so you might get some contacts if you advertise.