Getting back to Dave the Knome's earlier post, I would consider sending out your details as marketing. If you run a club or festival this is what happens.

Our folk club gets lots of leaflets. We don't consider them junk mail. We leave them on the table. It works both ways.

If DtK let's me know of his festival, I will make a point not to send him my performer details, nor to go there as a punter.