My daughter has been playing at SMCC (Streatham and Malborough) for 4 years now and it is a very family friendly and inclusive club - the quality of training has increased over the years and the kids all seem to be very happy.
The ethos of the club in terms of match selection has always been a good balance of putting out the side with the best chance of winning whilst also giving every child an opportunity throughout the season to play some matches (there are lots of inter-club friendlies organised throughout the summer too).
What age group is your son? The club is always happy to accommodate new players for a trial first to see if they like it.
If you contact firstname.lastname@example.org
you should get a quick response to any further questions you have.
Take care x