"I don't share my privacy life with my co worker, I just prefer to separate my personal life with work, so i don't think that would be appropriate to happen & it's against my principles".
My husband and I don't like a guy that works with me. He asked if he can have dinner at our place, how do I say "no" in a way that he won't ask again?
I'm with Cookie and Rooster. A blunt "No!" is enough. Excuses and evasions will make you sound weak.
Some time ago I read the autobiography of an Australian press photographer. During the filming of "On the Beach" he attended a party at the mansion being rented by Gregory Peck and was surprised that the leading lady, Ava Gardner, was not there. When he asked why not, Peck said, "I don't get to choose who I work with; I DO get to choose who I invite into my home."
So do you.
Like Cookie said : Just say NO ! It isn't good in the first place to fraternize with other employees anyway. Work is work and home is home. Once you let one person in, the others are going to see it as favoritism. Just tell him that your husband and you like your privacy when you're not at work. Don't think your Husband would be too happy about it anyway. Just tell him that you don't mingle with employees after work.