[maeln]

This as been happening in France also. We were also never giving tips before because there is a minimum wage but now, almost every bar & restaurant do it.

I wonder if it is not some form of US cultural influence. We see people tipping in series, films and such and start to do it to.

[fit2rule]

The credit card machines are probably set up to prompt the waiter for a tip. This is a common feature on POS systems, regardless of whether its sold in USA or Turkey.

[Symbiote]

Naturally all the machines support it, but it's up to the owner of the business whether to enable that feature or not.

[fit2rule]

Many don't even bother to turn the feature off ..