maybe not 10-20, but get your friends involved
as for settin gup a group, agree a name and general area then work at it, the surrey springers were born from a little chatting with 2 others, now the list is up to about 8 people, but thats jsut getting current bockers together, not really getting people into it
then once thats all set up ask naz to make a section on here for the group or whatever, gonna get one for us once the websites done properly, and has a proper domain name to it