“La cerveza” or beer (my favorite is the Bucanero) is everywhere and you can buy some 24/24, 7/7. This is why I hardly ever drank water there!
“Busca negro” (looking for a black guy): a word play with sexual connotations known in Cuba.
Humor is very present… Cubans have a highly developed sense of humor. In Havana, they laugh especially about tourists of course 🙂