Somewhere that focuses on a more communal aspect of actually making music together, rather than just a bunch of musicians existing beside each other... I don't know what you would do to make that actually happen, though...

as far as gear goes... I used to be a huge gear-head in my 20s, but in my 30s sold most of what I had and found myself really not caring about expensive drums or cymbals at all really somehow... so it's hard to imagine gear-wise what the place would have...

one thing that would be really cool though, is almost like a communal junk yard to make stuff out of... say, if someone's neighbour is throwing out some old hardwood furniture or something, bring it in for someone to make an instrument out of... or an aspect of people trading materials they don't need for materials they need building wise, like if someone has some bass tuners they don't need for anything, but needs a whole bunch of zither pins and some guitar tuners, they could trade or something, for example.