Parties require a certain number of fans before a party is available.
-- Burning Bernie (open: 10k, stage2: 500k, stage3: 1mil followers)
-- Flaming Wheels (open: 400k, stg2: 800k, stg3: 1.6 mil followers)
-- Whiplash (open: 1.2 mil, stg2: 2.4 mil, stg3: 4.8 mil followers)