I can't remember names, never could. Usually with faces or just people in general I notice one or two quirks that makes me recognize them in a grocery store. I pick up on stupid tics, the way people talk, walk, etc.
...but I hardly ever remember names.
But most of the time I can just say...hi...blah, blah, blah...and pull it off. Then two hours later I might remember the name that went with the face. I worked with the public for so many years I can just put on the mask even when I'm totally clueless.
Think about...if you were their boss how would you greet them?
Maybe just try to say hi, smile, like Jack said, avoid the ones you can, try to quickly acknowledge them when you have to...pretend they work for you...and if one of them takes it as an invitation and tries to follow you to your car at the end of the day...just beat them senseless in the parking lot.
Just make sure they can still talk, so that they spread the word and you'll never have to do it again.
