I had to go through the local department of parks and recreation. I gathered some interested pilots and approached it as a community event. In my community they are the ones responsible for organizing adult basketball, volleyball, youth leagues and things like that. After a couple months of pestering I was able to get a spot on the community calendar and flew twice a week. This year we are limited to once a week but once the schedule opens up we should be able to get another day if the interest is there. For indoor flying, I strongly recommend staying away from the warbirds. The guys here have just about every ultra micro made so I can tell you what's hard to fly. Here's a sample list and how they fly indoors.
Champ - Pretty easy to fly, not very aerobatic but definitely fun.
Vapor/ Ember 2 - Very easy and fun to fly, relaxingly slow. I sometimes warm up with it before giving it to the kids. My favorite for letting people try who've never flown before.
P-51 - Very fast, takes all of the gym to fly. Experienced pilots only indoors. It can be done, but it's stressful because you'll spend all the time just trying to keep it in one piece.
Mosquito Twin - Same as P-51.
J3 Cub - Pretty much the same as the champ.
Sukhoi - the old white one. A good outdoor plane, can be flown indoors but doesn't have the long throw servos so it's not as manuevarable.
Su26 XP - The yellow one- A pretty cool plane. Very good outdoors, much like the P-51 outside, but quite a bit more manuevarable. It's still a handful inside though, recommend for intermediate pilots.
Ultra Micro T-28 Trojan - This is a fantastic plane. It's the easiest to fly 4 channel ultra micro made. It's easy flight characteristics have me sold. When my kids are ready to start flying four channel, I'm getting a T-28.
Ultra Micro 4-Site and UMX Extra 300 - This type is the best for indoor flying. They are super slow and super aerobatic. You can pitch them into a high alpha and just float around the room. Even flying level they are slow enough to give you lots of time. They are also surprisingly durable.
Anyone who spends much time in the gym ends up going with a profile plane, something aerobatic. Once we go outside however, the warbirds are a total blast. The profiles get blown around a bit more, but since you can fly them so slowly, I fly them in my front yard or at the park while the kids are playing on the swings. You really don't need much space at all.
Here's a few links.
http://www.youtube.com/watch?v=yXjAwp_HYNY
http://www.youtube.com/watch?v=T_sfrRa1rU8
