Activities/groups for a 16 French Girl visiting for a week in July ? Post Reply

[Paulette]

Hello, My cousin is sending me his 16 years old daughter for a week in July. That's lovely and I love her, and I am sure I will find things to do (tour of East London graffiti, etc) but I was wondering if there are any teenage groups around Northcote road she could join? 
She plays the guitar!
Her English is not fabulous, so some French theatre?
Any French-speaking kids that would be OK to have her tag along a bit?

Any other thoughts or ideas are much welcome! Thanks  

I want her to have a good time and hang around with me, a single 40 years old working mum with a toddler won't be precisely fun I suppose even if this is London... Let's be realistic