The obverse legend, like other French coins, gives the kingâs title as Francorum Rex ( King of the Franks  in Latin) and provides another reason to call the coin a franc. Its value was set as one livre tournois (a money of account).
Favor has a no-tipping policy from company to restauraunt, so those waitstaff that take your order pay out the kitchen (they have to pay out a certain percentage of their total sales) for you to not tip. They pay the kitchen to make these orders and make no money, unless you tip out of pocket.
You can tip more or less depending on how pleased you were with the service. Remember, at a spa, you're paying the spa for the service you receive from the massage therapist or an aesthetician. While he or she receives a portion of your payment, the therapist is not being paid directly. Your tip helps to cover the overhead that is deducted by the business from his or her payment.