英国各地的YHA是不是必须是会员，否则好像每晚

请教，如题。

看到YHA网上写着：Prices are for YHA and Hostelling International members. Non-members pay a supplement of GBP 3.00 per night (Adult) and GBP 1.50 (Under 18) on arrival (equivalent to a daily membership). Families with children under the age of 5 will need to book a private room. Children aged 5-15 can only stay when accompanied by a parent, guardian or as part of an organised group and when staying in shared accomodation the parent or guardian must be of the same sex.To join YHA (England and Wales) please visit our membership pages.


大家定YHA的时候都是申请他们的会员吗？