The show was advertised for 7 PM, but it's a Lower East Side 7 PM, which means the slate in front of the Mercury says it starts at 7:30 and it doesn't really kick off till around 7:45. If you're lucky.
That's the clock time, anyway. In reality? You got an 11 PM show before the sun had barely set. But then Supagroup always puts on an 11 PM show, mixing tasty hooks and awesome guitar riffs in a balls-to-the-wall set that's half AC/DC, half Van Halen, and all energy.
Seeing these guys rock out in a venue like the Mercury is incredibly dislocating,because by rights they have a show and a sound that can and should fill the Garden. You know how a lot of concerts have the people who came for the music up front and the people who came to talk to each other in the back? When these guys play, nobody talks. When these guys play, everybody's there for the music.
Bottom line: file this group under S, not just for their name, but for Should Be Totally Famous Already.