I agree with you on the whole "it's hard to meet people after college" problem. Many times, i've conversed with my friends and contemplated on how we had it good back in highschool when you're forced to be with the same group of people for 4 years while growing with each other... at least, despite the hate and the drama, it was easier to "meet" people when you were in school... even college has its limitations, depending on where you go. I attend community college and it doesn't have a very active campus-life, so it's rare that I meet new "friends" there and become close enough with them to actually cultivate a well-rounded relationship with them.
The clubbing & bar-hopping... I've tried those too... but it just seemed to be wasted efforts and money in the end (personally, for me,) because the guys i've hooked up with at those joints usually ended up to be after something that I wasn't really looking for, and it just ended up falling apart... but there
are those that continue to go there every weekend night and continue to hook up -- and more so than not, they end up together, amazingly... so it does work for SOME people, though not all. If that's not your thing, then don't force yourself into it. you'll just feel bored and depressed at the end of the night.
I've actually contemplated in joining those online-matchmaking sites or getting hooked up by people at one point as well, but they all seemed so "planned" and almost too forceful... and until not too long ago, I even went as far to tell myself (and the people around me) that if I didn't find anyone significant by the time i'm 27, i'll join myself to those matchmaking or dating clubs/sites and have my go at the 6 date guarantees or what-have-yous that they offer... I would've gone through with it, had I not reconnected with my old highschool friend whom, I am now proud to say, is my boyfriend :]
That's another thing -- sometimes, reconnecting with people you've known back in jr high or high school can spark interest in you guys that didn't exist before... This works because now both of you guys went out and saw a bit of the world, experienced things out of the protective bubble that is teenage years, and matured -- even just a little

and that helps a lot in terms of compatibility and connections.
I hope this helped :]
<3 nana