Friend as in a lady?
G-club with gers, near to Piano and other discos n pubs. Another expensive place to drink.
Take this as a guide for most G-club,
No member, per bottle of Black or Chivas is about 3kTHB, lady drinks about 300thb per 45mins. Most G-club charges u 3 lady drinks for initial lady sits. So be prepared to spend about 5-7k THB per night and this excludes sex.

To book her as in bring her out of G-club, ask her not to work, again dun include sex, it will be about 15 lady drinks. Most G-club has 1 night off for the ladies. Normally it is Sunday night but most will still go work to earn extra money.
Member, depending on package, about 20-30k THB for about 10 bottles of Chivas or Black. Some package includes some no. of lady drinks.
Most gers dun go bonk bonk after work. If u want, u need to try your luck n quietly whisper to her n if she agrees then again quietly whisper nego the price. These gers dun want others to know she goes back hotel with customer.
A guide for newbies who is interested in G-club and wants to go after these gers. They are expensive for initially investment, but once u got her....ho ho ho.