I've recently started working in an non profit organization. We're working on different fields, one of them is work in a neighborhood where a lot of underprivileged people live. There we do most of our activities in a community center that is publicly run by a board of people from the community. The person that we come most often in contact with is a man that runs a bar in the community center, but he also takes care of the order in the community center, takes care of the keys, ...
Although I have the feeling that he (and the community center's board) appreciates our work here, he keeps making things difficult for us. He keeps coming up with rules that make no sense to us but interferer with our activities. He does these things without any approval from the board, however we can not expect any support from the board itself (they're on "his side"). When he's contradicting us it almost seams that he does that to feel important. I would speculate that he is bored with his uninspiring job and does this counter-productive things with the best intention of keeping the place in order.
It is very unlikely that he will be replaced and the community center is very important to our activities, so we need to make this work. What would in your opinion be the best way to deal with him and this situation?