Club 40 is a French weekly music chart that reflects spinning of tunes in French clubs. It was established by Yacast France Institute in collaboration with Syndicat National de l'Édition Phonographique (SNEP) in response to the need of music label producers and publishing houses to test the commercial viability of certain dance releases. Most electronic music is propagated initially through limited music releases and promoted through various clubs. In case a certain title gets notoriety on the dance floor of such clubs, a bigger label can take on and promote it on a bigger scale in general charts. Many of the biggest club dance hits appeared initially in Club 40 charts before becoming famous on general music charts in France and worldwide.