Is this a radio or a night-club format? The Billboard Charts page list states that its tabulation is based on sales, downloads, streaming, and airplay while the Dance/Electronic Songs page itself says its audience impressions, downloads, sales, and club play. Personally, I've never heard of this being a radio format, except maybe as a special program broadcast on the weekend (e.g. a Saturday night "dance party"), but I'm asking for clarification.