Very very popular crossroads for nighttime street drinking (and snacking), especially busy at the weekends. Amazing atmosphere. The streets are filled with little seats but there are many different bars/vendors, so try to find one with cheap drinks. Bia Hoi should be 5,000d per glass but some places will run out later in the evening so check they have some before you sit down.
Ask for a food menu and dine like a local! Recommended.