This building is used extensively by students of all nationalities attending the University of London. Joining one of these is a great way to meet British students with similar interests. You can also meet people in the coffee bars between class. Living in a homestay is perhaps the best way to meet local people. Living in a London home will give real insight into how people live in Britain.
Most students get to know their hosts well.
Volunteer work is also a good way to meet local people, and the AIFS staff can arrange this for you once you are in London.