Land & Transport office at jatujak Bangkok is one the recommended place for Expats to get a Thai driving license there are two building dedicated for this work , building 4 is where are the documentation as well as few tests are conducted, while tower 8 has a huge driving circuit, where actual practical driving test is conducted
As making a driving license is bit time consuming process as specially if your make it for the first time, it could take couple of days depending on how fast you pass the different driving tests, some time you have to spend whole day or few half days, while your there , you can still perform your Salat
as on 4th floor ,near to the way to go to bathroom there is small musalla, room is clean but unfortunately bathroom on 4th floor is dirty so buy a water bottle from down stairs, as cleaning your feet inside a wash basin is against Thai cultural ethics and is consider as bad manners