Progfrog has 4 Riverside concerts.

There are three bands who share the name Riverside. 1) Riverside is a progressive rock band from Warsaw, Poland, founded in 2001 by Mariusz Duda (bass guitar, vocal), the late Piotr Grudziński (electric guitar) and Piotr Kozieradzki (drums), who shared a love for progressive rock and heavy metal. Up to 2003 Jacek Mielnicki was playing keyboard in the band, but some conflicts led him to leave the band, and in the same year the new keyboardist Michał Łapaj joined.