I'm bringing a uke to the annual Super Bowl party I attend and will play a Pete Seeger song in commemoration during a lull in the half time show, no matter how much my friends ridicule me.
My every-other-Sunday meetup group, the San Francisco Ukulele Rebellion, paid tribute to Pete Seeger by playing three songs he wrote or co-wrote: Turn, Turn Turn, If I Had A Hammer, and Where Have All The Flowers Gone.