I have no experiece with the type of venture you describe.
But I do have had some bad experiences with joined things in general. And there are a lot of things you will have to settle from the very start.
So of the top of my head:
1) whatever you do, have a solicitor put everything down in nice, precise, legal, binding documents.
2) make sure that building maintenance is worked out. Counting on people's goodwill will ruin the nice floor you have put in within a month. And neither will sticking a cleaning rota to the fridge with a cute magnet work out.
3) a bit morbid perhaps, but what happens when one of the original joined owners dies? Is their part of the building inherited by their children? If the person who inherited is not interested in dancing and therefor not interested in this project, what is the procedure for them to sell their part of the project to the rest?
4) how will this property you own appear on your taxes?
Therefor I'd suggest you have both a lawyer and a solicitor look into how you can get together as a non-profit community thing. This will allow you to draw up a company policy, a charter that will clear up all the little details and be legaly binding.
After all laws aren't necessarily there to restrict you, but to protect you.
For the purchase you will need to do quite a few legal things anyway, so it will be best if you use the opportunity to cover everything else as well.
I know I forgot half the things I wnted to say but...
Good luck
Stavros
(fighting the co-owner of a certain property, who is trying to con him into bankruptcy)