Meeting young people in Overijse

In September 2012 I came to Overijse as an au pair and now I would like to meet some more people to hang out with/drink coffees/go out with in the weekends. Where to find them?! I´m following language & art classes and I go to a sports club, but so far most people I meet are older/more settled. I´m 21, female and speak portuguese, english and some french and dutch. Would you know any facebook group/activity/meeting place where I can find more friends? Is anyone going to the Meivuur festivities and wouldn´t mind meeting someone new?
Thanks!