Share 'What's a session?'

As you might have been able to surmise from my previous question, I'm trying to piece together web content for irishphiladelphia.com around the general topic of Irish sessions. Improbable as this might seem, some readers ask us what an Irish session is. I tell them it involves guilt, the teachings of Abraham Maslow, unresolved conflicts over childhood experiences with concertinas, and plenty of…