The answer lies before you.
Younger guys don't want to go to meetings or technical seminars. We typically don't have the time to do so, what with jobs and kids and home improvement projects and trying to keep a marriage working between all of the above.
Give me a place where I can go and talk shop with like-minded individuals, any time, day or night. A place where I can bring a problem, toss it out and get a half-dozen ideas within a few hours.
Oh.... Wait.....
www.hvac-talk.com
It already exists.
Guys, welcome to RSES version 2.0, the WWW version. I see 'webinars' and other multi-media forms of educational material being presented here and it is awesome.
You want to get the younger guys involved? Put it on their smartphone, tablet, netbook, laptop, desktop, or whatever eWidget that comes out next.
Wait.... Weren't we talking gauges? Sorry for the hijack. I just needed to get that out.
If you don't buy digi-cools, you're a loser...
JOKING!!!!!