Re: Ask not, what your dojo can do for you..
My understanding has always been that a dojo was just somewhere to practice? So an off-the-cuff answer would be I have no obligations to it whatsoever if I'm already paying dues for it's upkeep. If the place was being provided free or at a discount because of what a great bunch of people we were, then I would reconsider my obligations to the owners of the practice area out of basic politeness.
My interest in the answers given so far is a blurring between place to practice and the people there (covers both dojo and gym answers). Any obligations I feel are always between myself and other people, so are based on my relationship between them and me.
Picky I know but I always get nervous when places are the foundation of respect rather than people.