The gym is operated by a third party, and the venue belongs to the property. Can you open it?

Of course. It is a serious breach of contract for a third party to leave the gym without notifying anyone in advance, including the owner, lessee, property management company and other related parties. Property management companies have the right to take legal measures against them and require them to bear corresponding legal responsibilities. At the same time, after the third party runs away, the property management company can find a management team or management personnel to re-operate the gym and carry out transformation and operation.