And while I’m dreaming, fetch me some lobster

I have a dream. I want to create “The On Call Brass Band” which can be flashmobbed to show up and play one of several tunes.  eg When the Saints, O Canada, The Pompous Ass March, Liberty Bell, Un Canadien Errant, Deutschland Uber Alles, I Will Survive, and Electric Avenue.  That way no matter what event they show up at, they’ll have something appropriate to play.  What, no Freebird?  (Full Disclosure, the PAM is my composition, very sprightly and cheery and nobody hearing it would realize it’s a poke in the eye).