I always test as introvert but it could just be shyness. I know that I'm extremely shy (due to having been met with a lot of hostility for my views, etc.), but I join clubs and do social things. However, I'm more comfortable with a club that is doing a specific activity, such as hiking or playing board games, rather than just going to a party. I also like sports, although I'm not very good at them! So if I'm with a sports group that is really into being GOOD, then I have a problem, but if they're ok with having someone who is not so good but who just wants to play for fun on the team, I enjoy it.