No Overflix. Their debut gig was in front of a cool 100,000 people on a warm day in London's Hyde Park on June 7, 1969. This free concert may have lasted just over 45 minutes long, but fans were treated to a selection of timeless tracks by the classic band. This is a unique opportunity to see the world's first super group, featuring Eric Clapton, Steve Winwood, Rick Grech, and Ginger Baker, perform for a very long time.