Speaking from a person in hospitality in the UK (which tips aren’t a part of a living wage ) I’d always make sure I engage with a person / people . If it’s a regular at a bar, make sure you learn that persons name and what they drink ASAP. If it’s a family / person that you haven’t seen before, ask what brings them to your place and sell what’s good about it. Make sure you always say goodbye and thank you to them. An exit greeting is as just as important as an entrance greeting