PRO ...This person wasn't a 'guest' ... she was hired by the client to play for 2 hours ... I think the client's thought was 'background' music played by piano and violin ... Had she not been a good player I would have insisted on some other arrangement immediately ...

The good ending was that several people came up for my card, including the 'client' who informed me she owns a printing company that specializes in wedding/party invitations, etc. and often gets inquiries about entertainment ...
t.