In this multi-purpose venue adjacent to the Potomac River,  the outside air couldn’t have blasted any hotter (at least since last summer’s Capitol Hill Arts Workshop in DC) as an auspicious crew of choreographers joined forces again, bringing some new yet some returning faces to perform a kaleidoscope of premieres.  The matinee that I attended was noteworthy for its accommodation  of young children who witnessed these “creative geniuses at work” from the vantage point of floor mats placed directly in front of the dancers. (The choreography showcase was mounted in a highly intimate setting - the large studio attached to Glen Echo’s historic Spanish Ballroom. )