I have to completely agree with you on this. My partner is the worst at doing this, every single time he leaves the table I have to go around and push he's chair in. We've even gotten into an argument over it, silly I know but really how hard is it?

would you believe that my son is the pusher of chairs... :) He is three, gets up after dinner or what ever he has eaten but never leaves the table with out pushing the chair in.. And if he sees one out of place he will push that it too..

I wish the rest of the family will follow his example.. :)

Yep, my partner is a classic, especially when we are out.  The funny thing is, he's the first to complain when someone else does it!