I first heard The Head and The Heart on a Monday. The place was packed, a tambourine started jangling and I found my foot immediately tapping.  People around me started singing along to the doot, doot, dos, whistles, and whoos; they were happy to be invited into the music without needing to be familiar with the lyrics. The Head and The Heart’s shows are inevitably fun as the dancing and clapping on stage spreads, breaking the crowd from their pensive appreciation of the music to active participants …