請教小費的問題

下列是探聽到的小費支付
如有不妥請糾正。

午餐10到15%

晚餐15到20%


Buffet:
自己拿飲料 - 一桌付一塊
服務生送飲料 - 一人付一塊

問題來了:
Buffet：服務生送飲料加送酒精飲料要付多少小費？

謝謝!

有一個小費網站
http://www.tipping.org/tips/buffet.html

Buffet
Waiter / Waitress
5% to 10% of the total bill is suggested. This depends heavily on exactly how much work is done by the waitstaff. In some restaurants, the waitstaff does very little. Usually is simply bringing fresh linen and/or utensils. In some other restaurants, the staff brings drinks, and some orders from the kitchen directly.

參考之!

謝謝啦!