I think there are a couple on here, I dont see why not.  I would encourage it.  I do assume the future has great things coming for steemit and I see band, artist and business pages being able to be created for directly in the future, but in the now, its not necessary really, but dont see any problem with it either.   I was considering opening another account just under my artist name, as @soundlegion is really like a band in the fact its in collaborative connection with quite a lot of artists and I just run it.  Really in my opinion the more pages and earning power you can create the better.