I`d look at this from an audience & venue point of view, are the band playing in venues that charge and to those that want to hear originals or in free admission pubs to a mixed bunch looking to chill/boogie/sing along on a Friday night. If the latter then drop the originals, or develop them and gig them at venues/to audiences who are receptive, but keep them separate. Dropping one or two in is ok, or if you have a following that come to each venue then you can put more in if said following like them, but other than that to me it`s like playing album tracks that no-ones heard of, pub-going Friday night chaps & chapesses aren`t generally interested in stuff they don`t know.