أحسن الله إليكم ، My classroom in my school will be going bowling إن شاء الله , and there will some teachers, IF there is music, is this haram? What if I don't listen to it?

If there will be free mixing and forbidden things like that, then we better not go. But if not—and music is played everywhere nowadays, even in hospitals—so if you're not going to listen and you'll be too busy with your friends and teachers and so on, inshallah, there is nothing wrong with that.