The drink- batidos (in this case one banana and one guava) - these are a beloved drink of the Cubans- a kind of fruit milkshake. Due to shortages in supplies the ingredients vary somewhat from vendor to vendor.
The place - the poolside bar at the Hotel Nacional in Havana Cuba, itself an institution.
What to do- order, relax while waiting, drink slowly, savoring the sweet delicious concoction and continue relaxing.
If this doesn't satisfy completely there are two options: 1. order another or 2. switch to the hotel's renown pina colada and start the process over!