Sue - I agree with your proposition generally.If however in a club if the percentage of songs which I enjoy keeps falling week by week from 75% to 10% then I must vote with my feet.
When others do the same the whole character of the club changes.
This is why every club must have a policy on what material is appropriate generally. Any singer new to the club will experience the atmosphere created by the club's policy and if they don't like it they are free to find somewhere that is more suitable to them.Or indeed start their own club!!
Happy singing.