Originally Posted by
Thai-Kiwi
The naming of THAI lounges has some history, and there are a number of them in different parts of the airport. You’ll also have access to other Star Alliance lounges, and there are a few.
Naming
Domestic departures.
There is a Royal Silk lounge for domestic flights. Food is modest, and alcohol is not available.
International departures.
Royal Orchid prestige lounge is a recently modernised Business Class Lounge, with a First Class section. Located in Concourse D, the largest and main concourse
Royal Silk lounge is a Business Class Lounge
Royal First lounge is (was) a First Class Lounge
Royal Orchid Lounge has both Business and First Class sections. They are smaller and are located in other concourses.
Star Alliance Lounges
You will also have access to Singapore Airlines, EVA Air and Turkish Airlines Business Class Lounges at Bangkok (I think that is all).
It may be worth mentioning how long (# of hours) you need to use and what time you will use them due to lounge operating hours. For a standard few hours visit during 7am-11pm (international departure), I would strongly recommend SQ lounge near D7 if food and beverage quality are important to you. If you need a place to snooze, TG and limited lounges operate longer hours.