咖啡店小費係隨意,無話一定要俾。但係如果你去餐廳食飯,而且有侍應服務,就一定要俾最低15%小費。雖然好多商家會表明18-20%小費,但係唔一定要俾咁多,你可以選擇”customize”,之後輸入你想俾的小費銀碼。好多國外酒店都無提供牙刷同拖鞋,所以要自己準備。since you are in Vegas, you must try In-N-Out burger and see if you have a chance to visit a restaurant called “serendipity”