Ditto everything that Karen wrote! I met a couple of guys who were decent but I didn't care if I ever saw them again. After a few meetings, found a gem. So, yes, you might have to kiss a few toads before you find your prince - but princes are out there trying to find a princess too.
I belong to a lot of groups but not many single men I'd be interested in or vise versa. Online dating broadened my horizon - I figured - at least I would meet guys who WANTED to date. And no - I never ran into any that were married, but we all know that happens. No matter what - check them out CAREFULLY before meeting, meet in a public place during daylight hours. And park where he can't walk you to your car (follow you or get your licence plate). Use only a cel phone number - home numbers can be traced to an address.
It is fun. It can be scary. But it can also change your life for the better. But play the safety card first.