According to this graph from NPR's website, an analysis of the Top 100 Hits of 2010, Rock music accounts for 8% of the selections.
Further, the article goes on to state that nearly 1 in 10 songs has a Dr. Luke credit, somebody who I'd NEVER EVEN HEARD OF before reading this article. Over twenty-five percent of this list contain references to dancing, a DK or being "in the club" or being "on the floor." Twenty one contain lyrical references to drinking or getting drunk.
Rock musicians still party... maybe they just need a little Dr. Luke magic?