Just saw this thread - I'm not a professional musician, but I played the piano for many many years. Now mostly, I play just for fun, and more than before, I'm into jamming with other musicians, esp my DD and DS, who also now play instruments. DD plays the violin, and DS plays the guitar - so we LOVE family music time, and there's always lots of instruments around for holidays. The three of us are currently working on our own arrangement of Beatles' Blackbird - which has been really fun lately!
Both my and SO's houses were very musical -my dad plays the guitar, mom sings, grandparents played around 8 different string instruments and the accordion between them. At SO's house, every holiday gathering is also an impromptu klezmer jam session - lots of uncles on clarinets, trumpets, trombone, and SO even plays the tuba! I love family music time!