Only 4%, that is quite a bit on the low side, the normal is 15 to 20%???
We share the same thought. The four percent is much lesser compare to 10 or 15 percent. To add more, it used to be that everyone paid with cash, or maybe a check, for anything, everywhere. However, we now reside in the credit and debit card era and are heading for mobile payments, but one should always make an effort to tip servers with cash wherever possible. Check more here