once played for a North West Moris side ( Banjo ) and left when the following definitions were mooted in my presence:-

1. A drummer is anyone who is not required for a particular dance

2. A musician is anyone who carries a melodeon wether or not they can play it

3. Anyone unable to dance thro' ill health or old age automatically becomes a musician.(usually a drummer if they can weild the syicks with venom)

As for me, I consider myself to be a musician both BBC (Before Basing Clog)and AD (after dep[arting)