It is a problem to get tickets when you are not living in Amsterdam and you don't have a creditcard..Why can't they sell on gaygo where you can pay in various ways!?
RUFF! is the main party of the Amsterdam Leather Pride / Get RUFF!
You can expect a dance floor, chill out zone and most important for such parties a large play area, well equipped with slings etc.
Be aware that the dress code will be strictly enforced! People not appropriately dressed will be refused entry to. Think rubber, leather, boots.