The Chicago Full Moon Jam fell on neither the longest day of the year nor a full moon — hence this years naming of the event “Dark Side of the Moon Jam” — but that did not stop anyone from enjoying the annual spectacle of fire throwers and nonstop drumming around the Arrington Lagoon in Dawes Park. And for this special occasion Cafe Au Lake served the usual offerings plus beer and wine late into the evening. This event was made possible with sup…