Search the indicated locations at the listed coordinates on the world map to find all 
eight taverns and get the "Barfly" achievement. Simply walk up to the barkeeper at each
tavern, watch a short cutscene, and defeat the bandits to unlock the tavern. You can see 
the taverns on the world map if you synchronize the viewpoints for the respective area.

1. Andreas Island (573, 720 coordinates).
2. Salt Key Bank (496, 629 coordinates).
3. Crooked Island (808, 545 coordinates).
4. Arroyos (192, 565 coordinates).
5. Corozal (37, 266 coordinates).
6. Grand Cayman (392, 325 coordinates).
7. Kingston (623, 172 coordinates).
8. Ile à Vache (839, 137 coordinates).