5Tl for a Carlsberg seems quite reasonable for what is in effect an imported beer - well played to the bar for getting a mass buy discount and passing it on to their customers.
Another point to remember is that most
Icmeler bars DO display their price lists so that you know what the price is going to be when you calculate your drinks bill.
In 12 years of varied Turkish holiday travel, I think I've only had to question a bar bill once, and I had made the mistake !
Any deliberate cheating could easily result in a bar being shut down by the local mayor and police - with huge financial consequences.