You're much nicer about it than I would be. I would probably call him up and tell him what great time my wife had, and how she can't stop talking about it even to her friends. I would tell him that one of them would like to join us at our next get together, and hopefully experience his "9 inch cock" up-close and in person. I would ask if he "would mind bringing his video camera?" so we could all have some memories of the wild evening we were planning!
Then I would ask him to reserve a really posh hotel room in downtown San Francisco, and to plan to meet us there, and to spend the night. I would suggest one that costs at least $200-$250 per night, as "this other woman we're bringing is definitely high-bred, and won't stay in a cheap hotel." I would of course offer to split the cost with him 50/50, payable to him in cash when we got there.
At our agreed upon meeting time, I'd call him at the hotel and make sure he'd checked in to the room. Then I'd explain that we were running a little late, and "would he mind having a couple bottles of Champagne waiting on ice, so we can start the party as soon as we get there?"
"Champagne makes the girls giddy" I would explain. "Just leave it on the room tab, and we'll settle up later." I'd tell him we were "on our way," and would be there "in about 20 minutes."
Then I wouldn't show up.
I wouldn't even answer my phone for an hour or so - long enough for him to be charged for the room AND the Champagne. When I did answer my phone, I'd say -
"Sorry, the girls couldn't make it. They had to catch a plane to Beijing or something, so I went home. Enjoy your evening in fag-town with your hundred dollars worth of bubbly and your $250 turn-down mint, asshole!"
Yea, payback is a mother-f*&^%r!