We have recently obtained a new building with various rooms and ample space. The building will be used as a senior center. When it comes to renting or providing space for independent fitness trainers to provide services to their clients, who is responsible/liable if something were to happen? Does the trainer need to provide their own liability insurance? If there are other aspects that we must keep in mind as landlords please let me know, I would like to offer these spaces to people looking to start their fitness services, they might even get some clients from those attending the center.