Sometimes people don't say things just to boost your confidence. Some people like the fact that you tried something new and try to include others to make them feel comfortable. They included you in the game because they didn't want you sitting alone and being by yourself. They wanted to include you in the game and for you to have some fun. Don't look at the situation as you looked foolish, look at the situation as you got to try something new, and may have made some new friends at the same time. The coach may want to include you in more activities later on knowing you at least tried this one. Good luck.