cool shots, looks like fun !
buuuut ... i really don't see the point in gliders, especially if you have to be towed up by a real plane in the first place...!
Aside from the skill-enhancement aspect (there are some who say glider time does not apply well towards powered flight skills, so I won't get into that here), there are a number of good reasons.
#1: It's cheaper. I want to keep flying until I get a plane, and since I rarely fly cross-country anyway, even when I'm renting powered aircraft, I think I'll be happy to putter around the airport for less than half what it would cost me to do the same in a rented Cessna.
Tow fee is $10, to cover fuel for the "real plane". Then you pay $1 for every 100 feet you get towed to. Once I get the hang of it and am signed off for the single-seat 1-26, I could very well get a few hours logged for less than $50.,as does one of the more experienced members of this club. He can wander off for four hours after being towed to 3000. That's four hours' flying- challenging, fun flying- for $60.
Sure, there's a significant "buy-in" fee ($1K), and a bit over $30/month dues, but that's still below half the average cost associated with any powered club in the area, including the "buy-in" fee.
Most clubs in the US want at least $1500 to get in (oras much as $5K), plus anywhere from $50 to $100/month dues, and the hourly rates for aircraft are typically $70 plus, and rising with the cost of avgas (which is averaging $6/gal. now).
#2: this particular club brings benefits as regards my powered-flight aspirations: I will probably get some loggable time in the Citabria, maybe even qualifying eventually for tow pilot duty. As far as I know, outside of dues, that time will cost me... hmmm, let's see... oh yeah,
nothing, if I am on board as part of a tow which someone else has paid for.

It costs about $130/hr average to rent a Citabria, and most outfits that offer them do not allow solo flight. So add the instructor's fee, and you're looking at some serious money. The tow flights are brief, but I may also get an opportunity to do some aerobatic training in the club Citabria, although that might end up costing me a few bucks.
There's also the Breezy, which is owned by a few partners who are also in the gliding club. Might get some stick time in that, too... most likely for nothing, or perhaps my fair share of the fuel.
Along similar lines, there are other planes owned by members who might want to put up with me from time to time: a L-4, some Skyhawks, and of course Herb's RV-4. The more often I'm hanging around the airport, the more likely this is to happen. Look what heppened to James: he's standing there taking pictures, and next thing you know he's getting a free helicopter lesson!
#3: It's a team activity, more social than any club or FBO. I like that aspect of it; every flight requires at least one helper. And we have a good mix of guys: two C-17 pilots, a couple of experienced civil CFIs (including a CFII), some experienced tailwheel and floatplane pilots, mechanics, and at least one guy who's never flown anything but gliders. They're pretty much all obnoxious wise-asses, which makes for a good time.

#4: The time will come, soon, I hope, when I have my own powered aircraft and I can do more long trips and maybe get my IR... but for the next year or so, I'm really looking forward to trying something new.
#5: Did I mention it's cheaper? Yes, but I didn't mention that as a member, I get free instruction towards: Private Pilot- Glider; Commercial Pilot-Glider; Flight Instructor- Glider.
