Due to some recent comments concerning a competitor I thought it would be good to start a thread on La Monita.
It is located near Mahatun Plaza - just off BTS Phloenchit.
Billy & his wife O serve the best Mexican I have found in Bangkok (Tacos & Salsa being number 2).
It is not a drinking place but the salsas are just incredible.
http://www.lamonita.com/
Menu.
Mexican food lovers will like this place. Open for lunch & dinner (stays open all afternoon)
Bon Appetit.