www.plentyoffish.com
Probably not as good as match or some of the pay sites, but free and with a decent selection of members.
A couple things to keep in mind about dating sites to keep them a little more successful.
1) Have a pic. Most people will not respond to an ad if there is not a pic.
2) Have a current accurate pic. Nothing is worse then meeting somebody you thought was attractive only to find out they showed you a 10 year old, 40lb lighter pic. I love the whole attitude where people seem to think that they would not want somebody that only was in to looks and that personality is all that matters. Let us face the facts, attraction starts at the physical. Besides, you know if you still look like that pic and if you don't you displayed the quality I like the least which is dishonesty.
This also does not mean to use that shot that even though it looks really good, looks nothing like you. It is still a lie.
3) Make sure all your pics have you in them and avoid ones where people are cropped out (that pic of you and your x is not the pic a would be lover wants to see). Also leave out things like vehicles because it makes you seem pretentious unless it shows an accurate description of who you are. Basically, a pick with you in a high end sports car is not good, but one with you working the trails is ok if that is part of who you are.
4) Put thought in your description. This is particularly important for men. Sure, the physical is first, you can't expect the gym rat to go for the the fat rat, but the person on the other end wants to know there is more then just looks. Things to keep in mind when writing one is spelling, grammar, and punctuation. You don't have to be a road scholar, but you don't look like a dumb ass either. Most importantly, NO internet short hand because "typin lik dis makes u seem lik a dum azz". It is actually more important how you say it then what you actually say. Most importantly, don't lie.
5) Don't push meeting somebody but it has to take that progression from pen pal eventually. Offer a public place that you guys will meet at and not to pic them up. I like to meet during the afternoon in a place where you can talk and hang out. Plan it short but in a place that if things go well you can continue.
There is more, but this will get you started with success.
There is no shame or is there anything wrong with meeting people on line. I had no problem meeting people in public, but also find that I usually meet better people online since like me, many of them have no issue with partying, but are over the entire bare scene.