Share 'Press Kits - and the demo within'

I have been researching and many just say put a 3 song sample of your album in the press kit. This would be for booking gigs by the way. My question is a simple one. When booking gigs back in the day when I was in a rock band, we got away with tossing the club owner or the guy responsible for booking, a CDR of our music. Now as a song writer not only trying to book gigs locally but plan localiz...