Tipping in a United Club or United Polaris lounge is never mandatory, but it is often appreciated, particularly for bartenders or servers who provide personalized table service. In a standard United Club, where most food and drinks are self-service, tipping is rare and not expected. However, if you order a premium cocktail or a specialty drink from the bar, it is common in the U.S. to leave a $1 to $2 tip per drink. In the high-end United Polaris Lounges, which feature a sit-down "Dining Room" with a-la-carte service, tipping is more frequent. While some Polaris staff are technically in "non-tipped" positions with higher hourly wages, many guests still choose to leave a $10–$20 gratuity for a full meal. Ultimately, since the lounge experience is designed to be "all-inclusive," you should never feel obligated to tip, and you will not receive lower-quality service if you choose not to, but a small gesture for exceptional service is a common practice in American airport lounges.