April is the month of rock and roll inductees. Even though the event usually takes place in a much cooler city then Cleveland, we can still take the credit for housing the rock hall. Located downtown, this vast building has layers of goodness. Top-secret performances are always happening for 10 bucks or less. I happened upon the Staple Singers and a Jackson 5 tribute band during a weird rock/gospel/pop/rhythm-and-blues kind of week. This year ABBA gets the big entry key, as well as the Stooges. A shirtless Iggy Pop is never hard to say no to, and Abba is a love ‘em/hate ‘em kind of group. (Although I’m pretty confident that everyone secretly loves ABBA.) Musicians influence design almost as much as designers themselves. Take a look at these two musically inspired invitations.