Disclaimer: I'm not 21 yet, so my experience in clubs in limited but...I've been in similar situation elsewhere...
First off Cutter, you really do need to get over that. You should really contemplate what's keeping your confidence level from peaking to superhuman levels, and change your whole frame of mind on it.
You look 36? That's a plus...if you want it to be. Why don't you roll into the club, and instead of feeling inferior to all those 21-23 year olds, roll in knowing that you have the upper hand because you are more experienced in life, can teach a girl more about the world, love, sex, and herself than most of those guys can...and find out if you can make some of them feel as if you're "daddy" for the evening? Seriously, any girl who has any sort of attraction to security, stability, experience, and/or brains can potentially be at your disposal.
Plus you're there with a wing. I've been to clubs/bars a few times flying solo...and it's not nearly as much fun when you're with someone who understands the game.
Now...what to do about all those ripe 9's and 10's with no supposed desire or way to converse with you.
Step 1: Create the desire
Learn to dance? That's one option. Probably a good investment.
Have your whole look immaculate? A Definate.
Body Language turned all the way up? Of course.
But if the situation is as drastic as you say...I have a decent idea. (This is only theory though, so don't quote me. But if you haven't already, I'll let you know in a month how it goes, after my 21st.)
Why don't you try rolling in there with as many pivots as you so desire, and at least a wing? The way I see it, it's a win-win. The worst that can happen is that you'll have a fun night out at the club with some hot females who already want your loins. But with all these females (and if they are showing that they want you), there will probably be many oppurtunities to meet other females who are dying to find out who you are, and why you're with these chicks and not them. If sand is their leverage, bring the beach.
Step 2: Create the path to interaction
Now at this point, what I would do is simply (while your whole entourage is laughing hysterically, and having a blast), call some onlooking female over with a wave of the hand. If she so decides to leave her lonely state and join the party, it won't be awkward for to just lean in super close to her earlobe and in a sexy, Barry White voice, with a hand on her back say...well I'll let you use your imagination on that one.
That's one situation. Want to hit the dance floor? Just go out there with two of the prettiest pivots, show them the time of their life, make sure the target sees this too...and...well, just make some eye-contact, and approach her to begin dancing. Not on some "I want to dance with you, would you like to?" tip, but more like "I know you know I can show a girl the time of her life on the dance floor, and you look bored. Let me save you." If she's feeling adventurous, take it from there.
Those two are some basic ideas I can imagine now...Let me know how the club scene treats you Cutter, and I'll be sure to hit you up with some stories of my own as I find out what works and doesn't
P.S. For those that don't know, a pivot (according to The Game's definition) is "a woman, usually a friend, used in social situations to help one meet other woman..." if you don't know, try going to a party with hot females, and notice how other women notice you.
Party on...