青年旅社会员卡

想定比利时布鲁日的青年旅社，查到一家比较满意的，但是好像要会员卡的，不然就要加3欧，不知道这个会员卡是怎么一回事，有人可以帮忙解答下不？IYHF/ Hostelling International membership card 哪里可以办到，办得话要钱吗？多少钱？

This hostel is part of the Flemish Youth Hostels Association , which is a membership organization. The prices quoted are member's prices. A non-members supplement of EURO 3 per person per night will be charged on arrival for those guests not in possession of a valid IYHF/ Hostelling International membership card


有人可以借我用一下吗?这周末,谢谢了!或者有同去比利时的?可以PM我,