You can but I NEVER would! The risks from a "good" social group of dogs playing is huge. It only takes one wrong turn to plow into other dogs/pups and hurt them - young dogs will over exert themselves - the are a lot of injuries from play. By using these places you are teaching your dog to indiscriminately interact with any dog they see -leading to ignoring you and sometimes even leash reactivity. This is also the best way to pick up things like kennel cough and parasites. If it's not a "good" group the risks are even higher. Last year a local dog was attacked and killed by a new daycare dog, I had a young dog in class that had 3/4 of it's ear ripped off at daycare. Lastly it's never safe for dogs to play with collars on anyother equipment on! Yes your dog should have the opportunity to interact with their own species but please limit it to a few at atime and safely under YOUR supervision.