For those out there who don't know the distinctions among communities, and that seems to include this author, there is overlap, but clear distinctions. These are important to be aware of for public discussion. I've hosted a weekly ecstatic dance for 14 years, and only very recently heard the term 'ecstatic' applied to events that are basically rave/EDM (electronic dance music) dances. It is a trend in an attempt to find a more wholesome form of celebration than club, rave, or drug-prominent festival dancing. It's also fueled by disillusionment with the whole festival scene. So EDM DJ's have started re-fashioning their sets to sound more like ecstatic dance. Actual ecstatic/conscious/free form dance is barefoot, substance free (no alcohol served) and practiced in regular weekly events and workshops. 
We've had very little crossover with the Bliss jungle folk in the 15 years of my ecstatic dancing. But yes, they were 'hippie' cousins, pushing edges while we have focused on core health.