By then the demand from Trekkies was large enough that rival convention organizers began to sue each other .
6,000 attended the 1973 New York convention and 15,000 attended in 1974 , much larger figures than at older events like the 4,500 at the 32nd Worldcon in 1974 .
The demand from Trekkies was large enough that rival convention organizers began to sue each other .
6,000 attended the 1973 New York convention and 15,000 attended in 1974 , much larger figures than at older events like the 4,500 at the 32nd Worldcon in 1974 .