Some hotels are family friendly. That is, they have a swimming pool, an arcade, a playground, and things for kids to enjoy. Others may not like children, but all the hotels have other guests who expect your children to behave during their stay.
If you have a child who is involved in traveling as a hockey, basketball or soccer, you know that you spend a lot of time in hotels. There are games, there are tournaments and probably the entire team (if not multiple teams) are all lodged at the same hotel. That makes many children. It's great because you get along with the other parents that the children fly with their friends and companions, but there should be limits placed on what the children can do in and around the hotel.
For example, no other guest estimates a band of children running down the corridors in the top of their lungs. If you do not let your children run so home, why do they do it at a hotel? Another thing that takes away other guests is that the quiet times are not satisfied. Just because you are away from home does not mean that you can take action all day and night.
Being in a hotel is freedom, parents can go to the restaurant or bar while the children go into the swimming pool, but this is also difficult, since children always have to be supervised around water, it does not matter its age. Even if parents turn to the seal, they are better than no supervision. Ideally, the children behave properly in the pool, which means no racing, not raining in superficial water and observing the stagnant rules. The same goes for the gym or gym center if the hotel has one. This is for all guests to use, and if your child has a legal right to be there, supervised then that's great, but having a lot of children hanging in the gym, other guests are not.
Most of all, children and hotels are a great mix, and families are observing the rules, the children are courteous and calm and everything is good when the area can run the problems arises. No one wants to be the kidnapped by a hotel, so observe the rules for fun for everyone.