In the past, we've always sailed Celebrity with the AI package, beverage, grats, & internet. We've always tipped the beverage guys1$ a drink, and have always gotten great service and good pours. Funny thing, when you walk up to the bar, your drinks are prepared as if you were the next in line. We give the sommelier cash tip at the end of the cruise.
Our next three sailings we have no packages so will just pay the required auto tip on our drinks, except for those who give extra pours. 😁 During the 5-7 happy hour, will tip the bartender/server1$ a drink.