No,please be honest, its what you the organiser ,[under pressure from an agents demands]decide ,what they are worth,not the audience.
Attendance at aclub can be affected by a number of other factors[whether there are any festivals on]television[world cup etc]etc ,it is not entirely down to the booked artist,
The best CLUBS ,are those where the organiser has nurtured a loyal following,and people will turn up every week regardless,TRUSTING THE ORGANISER.