Take their mrt to hua lompong. The take taxi there. Night time quite heavy traffic as there alot of food stores. Getting out should be fine... but if u cant speak thai sure kana carrot chop for cab fare. Abit higher only though.
Oh 1 more thing. Dont listen to bull crap story if they u chinatown close. ITS OPEN EVERYDAY. I TIO SCAM ONCE BEFORE AND THEY SEND U SOMEWHERE TO VERY EXPENSIVE TO EAT AND THEY GET COMM FOR THAT