Zan,,世界上这样的城市（人群）很多，伦敦，纽约，旧金山，悉犀，墨尔本，温哥华，多伦多，胡志明市，金边，曼谷，，，

Vancouver:

some family each weekend there is a house party; young couple will receive several party  invitation each weekend,,,,

Some people are just lucky,,,LOL