Red Rocks Named Most Attended-Venue Billboard magazine has named Red Rocks Amphitheatre the most-attended concert venue of any size, anywhere in the world, in 2021. The venue, which celebrated its eightieth anniversary this year, hosted 233 ticketed paid events. Billboard says gross ticket revenue was more than 60-million dollars on 134 concerts. The previous record for shows per season was in 2019, with 168 concerts. What’s your favorite venue for a show?