Dominos - very popular in PR!
Some people like to play dominos in El Salvador, but it's actually much more popular in Puerto Rico.
As for myself, I used to play a really cool Mah Jong computer game (the Chinese originally invented dominos but their variant of the game evolved into Mah Jong...)
Here's the Wiki(sp) entry for dominos:
…Su popularidad en los paÃses latinoamericanos es inmensa, particularmente en el Caribe Hispano…
Holy Crap! 4 of the top 5 players in the world are Cubanos! Although this site does look like it hasn’t been updated in a while…