Invitation Etiquitte

You`re really not suppposed to hand them out. However, I think it depends on who you`re giving them to. I have many friends who I know wouldn`t mind if I hand delivered them an invitation, and actually might prefer that I did that instead of spending money on postage. However, some of my parents friends would see it as an etiquette faux paux. Just "know your audience" and take it from there.