Although I was on the draft of the program, I was unaccountably not on the actual program, which was irksome but hardly worth making a fuss over.
For an encore, I organized extra seating when eight more people than there were seats showed up and ransacked the kitchen for plasticware and napkins (they were apparently out of silverware). The hors d'oeuvre table was no longer really necessary, so I consolidated the remaining grapes and apple slices and set places and chairs around one of the tables. We got a cool tablecloth and a centerpiece with a Buddha and floating candles at our table. :)
At dinner, I spoke to a tablemate about my interest in the harpsichord, and she asked if I played figured bass. "No. What is it?" She explained it as numbers (indicating chords) in the bass hand, over which is a melody which the performer is expected to embroider. "It's really hard to learn," she said.
Doodling a melody over a chord progression is one of the techniques I already use to construct improvisations. Granted, I don't usually pay very strict attention to how many measures of I, IV or V I'm playing, because no one cares, but I think that could be picked up with some practice. So, huzzah! It's a possibility.