Jeez.
As a member of the Golden Gun Club (two years now) I've never felt like I didn't belong. It was a bit overwhelming the first meeting I went to, but I got over that in about fifteen minutes after I introduced myself.
I'm younger than most people I see out there, (34) and I don't fit the demographic either.
I started shooting an AR in the Service Rifle match once a month when I joined and now I consider most of the guys my friends. Oh, by the way the President and his son shoot Service Rifle too, and is a great guy too.
Grab a rifle, come out for a match sometime. You WILL feel welcome, because I think we go out of of way to make it so. You don't need to be a member. If you do attend a Service Rifle match (third Saturday of the month, $12) ask for Jason. I'll introduce you to everyone I know.
The club itself has a few rules of course, but they're usually self-evident. Make nice, clean up your mess, don't speed on the roads...
I've worked from the leather there, the range was pretty quiet (as most weekdays) so it'd probably be a bad idea on crowded days I'd gather. It CAN get very busy on match days.
GCC moved from Golden in 1996. The dues are $160 per year with a work party slip (volunteer a day of work, sight in-like I do, etc..) Or $260 without, and you must be an NRA member.
As far as too "good" for you to hold IDPA, 3-gun.. Lack of suitable facilities? Why don't you ask them? Someone would have to run it, you'd make a great candidate!
No good old boy network here. Sorry, maybe it used to be, but I think the club has realized our hobby is under attack from all sides, and we should be inclusive rather than the latter.