I just had a couple adult beverages before my flight today and paid. I honestly didn't leave a 20% tip, mainly because $30 for two drinks always pains me before a flight. Even though I only tipped about 10% the bartender figured out which flight I was on because I neglected to put my credit card away. When I boarded, the gate agent gave me my credit card. I could not have been happier and unexpectedly surprised. I wanted to go give him an extra tip but unfortunately this review was the best I could do since I was already boarding.