Entry for visitors: €5, kids up to 14 are free. Pay cash at the door.
All participants start with the same amount of tokens. You challenge anyone you like and you get tokens when you win, depending on if you are the challenger or the challenged or if you decline a challenge. You can earn tokens also with attending workshops, a way to redeem yourself in case you lose all your fights and have no tokens left. You can gain more as the instructor will have some tokens as well to give away to those that excel in his workshop. We keep track of how many fights you won and in the end a few top guys will come out and there will be king of the hill amongst those 5. There will be an auction, where you can use your acquired tokens and bid on the stuff you like.
The nearest hotel is Ibis Styles Haarlem City.
A budget alternative is a hostel, Stayokay Haarlem.