I have booked a first class ticket flying Singapore airlines from Los Angeles to Seoul and then onto Sydney using krisflyer points. My question is in the first class star alliance lounge at LAX, how does tipping work? If sitting down in the dinning area or someone is serving you a drink, would you have to tip and how much would a recommended tip be? I am going on a budget holiday and was lucky enough to get a first class ticket through signing up for a few credit cards and using points but not sure about tipping. Being a first class lounge mostly used by business people, i'm guessing tipping would more than getting a drink at a bar?