Should he share the AC unit?

So the house we rent has no central air we have 1 AC window unit. That unit is located in our roommates room. So while his room is at 54 degrees (that’s what he has it set to not joking) our room is at 85 degrees with a fan blowing. Our puppy was practically dying from the heat he kept us up all night because he was so hot. Is it right to ask our roommate if he could move the AC unit into the living room so we could all use it? Either that or he will start paying the electric bill all on his own if he wants to just keep it in his room.