Skiffle - has there been a skiffle band in the last 30 years?  Who?
 
 Merseybeat - Hmmm, would have to think about that, the Monkees?  (bad joke I know)
 
 Gabber - Well if you include hardcore drum and bass with Gabber then you can say LTJ Bukem who would be somewhere between the two.  
 
 New age - Fletchers did do this with the "band" that went with Bardo Pond Fursaxa I think her name was.
 
 Kraut Rock - Mouse on Mars would work here I would guess.  Gary Neuman came a couple times too.