I finally found a BJJ school. In a couple of days i'll get there and see the place. But I dont have the slightest idea to what to ask or look for, when it comes to grappling. The things you look for in Muay Thai (etc.) gym would only help in general. So I need some advice from people who actually does bjj or any other grappling art. How do you understand it's a good bjj school? What do you look for when joining a bjj school?