Wimbledon & Roehampton meetings

Hi Everyone
SLAA has been recommended to me recently by a therapist, and I'm keen to attend a local meeting.  My nearest groups are Wimbledon and Roehampton.  Does anyone out there go to either of these groups and would they recommend one or other for any particular reason?  At this stage I'm not sure which to go to.  Ideally I'm looking for a group that's friendly and welcoming - the thought of turning up for the first session on my own is a bit intimidating!  I'd welcome hearing from anyone who knows one or other of these groups.
Cheers
Jude