Growing Pains 01 | Put out your cup

Two things servers need to know to increase their tips are to keep customers' cups full and don't interrupt their conversations. But what should one do with a customer who hides their drink at the far end of a booth? Sometimes we come to church wondering why we're not getting filled and satisfied. Could it be possible that a simple change we can make is to stop concealing our cups and put them out at the edge of the table where it's easier for them to be filled?