One idea I had as to how to keep a club to your own liking was to give preference to the type of material you are aiming at presenting. Say, for instance, you get someone doing a trad song in a singaround and the next person doing a cover of a contemporary song or a self penned in contemporary style. The next time round you miss the second person and give the first two. You would need to be pretty thick skinned I'm afraid and make absolutley sure that everyone knew what you were trying to achieve. Just the first thing that sprang to mind but it may help!

Good luck if you ever do it and I will turn up. If only to do 'The Bold Genadier' on the first round and Wonderwall on the second...

:D