"I'm asking for new ideas but I'm not be offered anything practical. "

The ideas are there, but you are on the wrong plane. You keep harping on the fact that one is a festival and the other a local club. You aren't seeing that there is a connection and the reasons Womad works can be a lesson for a small club. You just can't see the forest because of the trees.

The reasons that people go to a festival are not because of the size - it is because of the attitude, the music, and most importantly - the way they are treated.   As soon as you can understand that you can begin to translate into what is appropriate for your club.   It boils down to reasons why people go to ANY event regardless of size.