This is how it goes:
I see an email on a mailing list seeking chorus members for a performance of Tosca in a few days time. Naturally, I’m agog to sing in some bona fide opera (I’ve been singing church music for the last decade, and have only discovered opera recently), so I write back immediately, and spend the next two evenings in rehearsal, merrily switching voice parts according to need.
It’s amazingly good fun.
And at the end of it, one of the soloists asks for my business card, which is when I realise I don’t have one.