If you have a regular how to you say goodnight when hes leaving?

Loridan

Couple
Gold
Couples or men that visit a couple...
How does husband say goodbye to the guy/bull ?
A guy, black, white, older, younger or whatever has just had sex with your wife, maybe fucked the hell out of her while you watched.
When they're done what do you say to the guy ? Thanks...see you soon...come back anytime? Let's do this again next weekend?
We have a friend we enjoy sexy fun with. We're very comfy together, it's a fun, easy going night of sexy fun. Exciting and relaxing. We're all naked, we take turns doing her, watching each other and just hanging out. When we're done it's very awkward for me(and him) I never know what to say.
Husbands or the guy/bull/visitor. How do you handle this ?
Thanks