Up front training

How much training should you have before you can run “front of house” at a cafe?  We went to our usual Sunday morning venue today - and, admittedly it has had a change of management and it would also seem a change of staff, but you would think they would still be able to run a cafe properly … like knowing how old the croissants are, and when the jam is out of date … and to deliver the take-away coffee order (for multiple cups) to the table, the same way the previous management did.  I was not impressed.  But then, when collecting the coffees from the barista, that the server (who managed the get our coffee order wrong) was just “filling in” - I would suggest not very well but then again it might have just been that he had no specific training or maybe he was feeling put upon because he had been called in to work on the till. It looked as though there wasn’t much help for him either, so that might have been affecting his performance a little as well.