"...Since it is reasonable to assume that music concerts - whether rock, country, rap, or electronic music -attract some people who want to use or sell drugs, this provision makes criminals out of every concert promoter, nightclub owner, and stadium or arena owner in the country. Moreover, its broad language would allow the federal government to find and jail Kinkos’ managers, soda and alcohol distributors, and anyone else that provided goods and services to an electronic music event."