In the twenty-odd years we've been playing (The Daub'z...), we've had four or five line-up changes, with a core of three as constants. We normally cater for an hour and a half, In that time, songs have come and gone, and some have come back. At the last count, we have a repertoire of about fifty or so (I may have forgotten a few...); some only lasted a gig or two, others are still there, from the beginning, or nearly. We often try out a new suggestion, and one in ten cut the mustard, but it's really quite rare that we change much. Every rendition has its own 'life', so we don't get bored of them really, and, to be fair, we now play out very rarely (advancing years, and no tour bus for all our gear...). Hope this helps.