If you are in the Sutthisan area then the Huay Khwang Market is close to the station. The market is well known and has lots to offer. The street food is cheap as well as the clothing which is sold at the market. You will note that the market is always full the entire night as it is very popular.
The Huay Khwang Market is close to the MRT Sutthisan station and has always been an excellent place for shopping for fresh vegetables, seafood, fruit as well as clothing. Note that this is not really a tourist spot and is meant for people who work at night in the area. There are many places to eat such as 4-Ja as well as Kao Mun Kai and Kao Muu Daeng. Note that this night market in Thailand is open until sunrise.