Small numbers does not necessarily mean it's a "bad" chapter. Some times things happen and a house won't make quota. You sound like you really like this chapter, and IMHO this should be all that matters. If you like the house than who cares what others think? YOU should be happy.
I say go and check out the events and see what you think. I'm not sure how COB works there. Some places you have to go to the Greek Affairs office and sign up; other places you are invited. Maybe someone from her school can fill her in?