It may be that you're defining Rock'n Roll too narrowly.  I can remember an interview with Pete Townsend in Rolling Stone that appeared in 72 or 73 in which he claimed that no one would ever be able to define Rock'n Roll, "... they can say what it isn't, but never what it is."  

Anyway, try to keep in mind that the RRH of F has a broader mandate than just providing a space for aging rock stars to congratulate each other.  There is supposed to be space dedicated to root musics, especially the blues and folk.  Related music, like rockabilly, ska and reggae.