If you are going to play drums it is important to not wear rings. Wearing rings can damage your hands but can also damage the drum. Repeated exposure of the ring to the side or the head of the drum can slowly weaken it to the point of breaking. Or if they hit very hard it can damage it very fast.
If you were lucky enough to have replaceable drumheads this isn’t horrible. They are expensive and it will slow down your ability to teach drum classes, sure. You’ll be slowed down because you have to go get a new drumhead or order one. Or you may have to wait to raise the money to be able to buy the drumhead. If you weren’t lucky, you’ll have to buy a whole new drum.
While you can ask people to take off their rings, this can cause other problems. Some people may never have taken their rings off. From the time that they got married to today that ring has been on their finger. Sometimes they have gained so much weight in that time that they can’t get their ring off. Or they have arthritis and it is equally difficult. They also may feel uncomfortable about taking a ring off for fear that they will lose it.
One way around this is to bring Band-Aids. You can offer Band-Aids so that they can put one around the ring. This will soften the impact. Put the cushion side towards the bottom. Or you can bring ball chains. That way, people can take the rings off and wear them around their necks. They are inexpensive and will help people feel comfortable that their ring isn’t going to slide out of their pocket or get lost on the floor.