>if we should attend an a capella concert
>together, kindly restrain yourself.

I would be delighted to attend such a concert with you, though our lack of geographic proximity makes it currently improbable. My understanding of the etiquette of such is that it's impolite to perform *with* the performers unless explicitly invited to do so.

I also thank you for the giggle your anecdote generated.

Warmly with a side-order of meeting-hangover pomposity,

Joel