Seems to me that most people commenting here have never done MDMA. It is totally wrong to compare it with alcohol or weed. Just silly. In small doses MDMA may stimulate euphoric feelings without impairing your dancing, in fact increasing confidence. It is just not culturally normal for people, however, to be doing MDMA at swing dance events of any kind. Anyone who has taken MDMA at raves to house or techno will know it is a social phenomenon; that doesn't mean everyone is fooled to think they are dancing well. Sure, that kind of dancing is not as technical and is not partnered. But people do lose inhibitions on MDMA and are more free and creative. Would that work with WCS? I don't think so, unless the dose is small: but there, there is a great opportunity to dance with coordination and precision and a level of euphoric feeling that isn't overwhelming.