Dreikönigskirche (Epiphany Church), along the Main River, on my morning jog in Frankfurt during a visit for some Wikipedia community activities.
A upright bass, piano, banjo and horn ensemble you can dance to? Inspiration from Shakespeare, Steinbeck, and Springsteen? A drummer that can lead four-part harmony? Impossible? Nope. What is impossible is staying in your seat while these guys play.