We have a smattering when the enthusiastic have started them but it's patchy.
Naming conventions: use your best judgement but go with what makes it easiest for people to find - if there's more than one name go with the English for now and you can save the, for example, Welsh one for a Welsh-language community.
edit: as discussed in the comments, you may be better off with a more regional community first - those like London, Manchester and Liverpool already function like that as they cover the greater city area. So instead of Chelmsford and Southend, start one Essex; instead of Lancaster, start one for Lancashire. At least initially until things really get going here. That list is over here.