We promote our music events only with our own mailinglist.. We do not work with flyers, and never reveal any location information on any website.
We think that this way we control how many, and which kind of people is visiting our events.
This way we have a list of names and adresses of all and we can organize private (besloten) events, so that even in legal venues we can have a extended closing time, and no monkey bouncers at the door.