Former NYC bartender, Rick Steves, has outlined five signs that indicate a person at the bar is being person in the bar, including snapping for attention, stiffing tips, and ignoring customers. These signs can be found at bars in New York City, but this advice is also good advice for visiting U.S. bars in general. Steves notes that being well-liked by bartenders makes life easier and that it pays for faster service and a chance to get a drink or two for free. He suggests that a friendly wave or raised hand or finger is an effective signal for a bartender's attention.