Snail,[imo]as explained ,a bad system.
Festivals charge a weekend price[many of the artists are paid differing amounts]but it is not reflected in the ticket price,the audience is free then to make its own judgements,solely on the merit of the artists performance.Why should a /club be different?
what you are doing is similiar to handicapping in horse racing,and is totally unfair on the lesser priced guest artist.