I guess you could invite him in a casual way something like...

"D and I are going to the company's end of Summer football game and tailgate party. We were wondering if you'd like to go along with us?"

If you decide to invite him you need to give him at least a weeks notice.

Jen *The more anger towards the past you carry in your heart, the less capable you are of loving in the present*

The end of the DB road