Perhaps.<p>After a while, there are certain tendencies that are exhibited by guests which can be profiled. Just like a good electrician can tell if the lines in your house are &quot;home runs&quot; or daisy chained based on the gauge of wire and material, a server can &quot;guesstimate&quot; their tip based on the customer.<p>I&#x27;m not saying you KNOW this is going to happen but you know if you&#x27;re getting 15% or 18%+.