Every year, Summerfest brings the hordes of still-kicking rockers and rollers to the shores of Lake Michigan for another guitar-ripping jamfest. The bands of the ’70s and ’80s draw everybody from the young and inexplicably nostalgic to the elderly who still overflow with the unquenchable spirit of rock. But what do these bands look like? Sure, you remember how Robert Plant looked in his prime, wriggling around and singing about Hobbits, but what about the bands today. What do the bassists look like? The drummers? Here’s a quiz to test your knowledge of the ’70s and ’80s bands you can see at Summerfest....