austin
I think that some receipt printing devices automatically calculate the tip so you don’t have to drunkenly do the math when closing out the tab. It’s a suggestion based on average tip etiquette that I’ve seen used at bars and restaurants which you may or may not choose to adhere to based on the actual service received.
In regards to service at beveridge place, while they don’t have a table waitstaff to serve you, everyone who works there is super friendly and more than happy to chat away about the details of their vast range of drink on draught and in bottle. Being able to speak with someone who knows the selection well and can offer you guidance and suggestions is far more valuable to me (read: tip-worthy) than a simple drinks-runner. Though they are well on it in regards to clearing away empties; I rarely get a couple of sips into my next before the previous has been whisked away.