Guys ,
It is impossible you charged in a Bar 700 TL for a couple drinks. I guess your friend invite a girl to table and buy her a couple drink too. The girls are consurmatress and drinks you offered to her includes consurmation fee which wil cost you around 50 to 250 TL for each drink she has. And she will finish a drink in 30 minutes will ask for more if you are not going to buy she will leave the table. And it is really rare that you can get laid with these girls. So don't waste your time in this kind of places use escort services will be much more cheaper than coupleof drink and will be with happy ending. Please don't order anything anywere in Turkey without having the Menu with prices. And don't forget you always rights to go and complain these people to the nearest Police Station your money will be paid back for sure. These what I can tell as a Turkish Guy :) And sorry for the troubles you have faced.