Online dating your area
Accept every party, wedding or social networking invitation you are given and attend.
Another idea along this same vein would be to host your own party, where each invitee brings a potluck dish and a single friend (of the opposite sex for heterosexuals or same sex for gays and lesbians).
Find a busy coffee shop that you feel comfortable in, and take up a space near the main door.
Avoid bringing anything to distract yourself with if you can manage it, although this may be more difficult for some than for others.
Coffee shops are one of my personal favorites when it comes to places to meet singles.
It may seem obvious to some or completely alien to others - yet it works.
Not4helps you meet platonic friends online that you can connect with in real life.
Then, make a point of 'greeting' each person who comes in the door, whether with a smile, comment or friendly hello.
There is no need to make your introduction rote or sound like you're working at Walmart though, just try and be yourself doing something that may not come naturally.
I find people seek romantic relationships instead of friendships to avoid that transitory feeling, and also to feel emotionally safer.
Will pass on the word about your website every chance I get!
This way there will be an evenly-matched number of singles, all interested and ready to meet someone new.