When you visit the bar area (for example at soi bukhao), and you are in need of some company, there is always a lady (or boy) that would like to talk to you. Often they will ask you for a "lady drink". It is simply a compensation for them to talk to you. The price of a lady drink is a bit higher then a regular drink. It is very simple: the bar gets the drink cost and the lady get the rest as a ‘commission’. So lady drinks are not a scam (as sometimes mistakenly is told on some youtube channels). It is simply a business model for the girls and boys working in the bar. It is very common in Thailand and especially in Pattaya and Bangkok. Prices are always transparent and often even visible on the menu. Ask for the price before you order a lady drink. If prices are not transparent, just go to another bar. To avoid any problems, just make sure you check the bill as soon as the lady drink has arrived. It is very normal to double check these things. If you follow these rules, you will have a great time in any bar in Pattaya.