Challenging your own tendency to be a hermit is IMHO the best place to start. Go out. I took me far too long to learn this myself, so I'm not just being flippant. Pick one of the nights - Sanctuary, Descent, Blankwave - and show up. If you're broke, remember cover is nominal and no one says you have to drink. Show up regularly and you become, by the very definition of the term, a regular. Inevitably you end up meeting other regulars and next thing you know you are embroiled in a festering cess-pool of club drama you have a circle of friends with common interests ;-)
Really, it's that easy.