Frank the server was very inappropriate in his attitude. We ate a quick breakfast here and paid with a credit card. The others in the group were paying the tip with cash. They quickly left for a conference and forgot to place the tip on the table. The server Frank came outside of the restaurant and chased us down. He then proceeded to scold us in public saying that he lost $6 on our table (although our bill was more than $100 and we would have tipped at least $15). He yelled at us "Is this how to do this" as if we purposely and routinely dine without tipping. Very tacky and humiliating ....