I can go either way with indoor or outdoor. Ranges here,regardless of locality, have the seasoned shooters and us old timers gathered around for shooting the breeze and swapping lies.
Add to that any "new blood" coming in gets a warm welcome and fatherly advice on shooting matters if it is really needed or sought out. There's a core of 'been there and done that' crowd who are willing to make anyone feel at home and at ease.
These folks do have more experience in the way of the gun for more years and more types than do I. Hate to admit it, but there it is.
This is at most of the indoor ranges around this metro area and in the smaller towns as well.
Outside range, about 25 minutes as the crow flies, has a lot of shooters willing to exchange ideas,exchange guns for try outs under safe conditons,and talk gun talk.
If there is someone we do not know who is just looking, then the red flags go up somewhat.
For the most part everyone behaves themselves ,though slobs(read unsafe,too) with guns make life frustrating, annoying, and if staff receive a tip, will be banned and asked to leave.
So I guess the vote should go to inside ranges, but by not a lot.
Do enjoy both types though.