I share a very small studio space with a drummer and keyboard player but we don't play together because of the differences in our music. I am the contact with the landlord and the principle renter. Because the studio is so small, I can only use it as a place to practice by myself. The drummer and keyboard player have enough room to add another player but there really is no room for me to add anybody because of the layout. The drummer is bit of a difficult person and a few months ago, he went into a pissy fit when I changed the locks for an obvious security issue and then wouldn't respond to me to meet up with the new keys. His next message accused me of locking him out with some sort of intention. The relationship has eroded further with him not sensing the need to text us other two when he is going to need the studio. He has no problem receiving our texts informing him we will occupy the studio but he doesn't reciprocate most of the time. I have told him to do so a couple of times but I am pretty sure he just goes without saying a thing. Hopefully you agree it is a courtesy to let others know so you don't drive 30 minutes to end up finding the studio occupied. He really hasn't done anything obviously wrong but I want him out of there. Any suggestion on a decent way (somewhat humane) to let him know? I furnished the entire studio and equipped it with everything - sound proofing, carpet, pa, mics, lighting. I was thinking about yanking out the pa to get a negative reaction then unload on him.