Expat social groups

Does anyone know of a social group for 20-something expats where they can meet and interact? Or even a Facebook page where it would be possible to organize such get-togethers? There are so many foreigners in the city but it would be nice to have a Hub a common place where we could organize social activities and meetups. One of the hardest things about moving is not knowing a lot of people.

People use to suggest meetups here. But then came back and said even though many people said they would come, few people actually showed up. So in the end, people gave up trying to organize meetups here.

Kind of sad.... But people saying they will come and then don't is not uncommon in Hungary.