I don't care how much you can drink, if you went on a bar crawl every night for a week you wouldn't cover all the bars we have in Puerto Rico. This is where most people go to enjoy most of their evening.
Most bars have some form of entertainment.
Later on there's a DJ as the music gets turned up. Some bars have other forms of entertainment as well, there's always karaoke somewhere, quizzes, darts tournaments and so on. Bars are open all the way through the day, closing in the early hours of the morning whenever they start getting quiet, usually from 3am midweek and from 4 or so at week-ends. If it's busy, it's open. Going out for a drink in a bar is what makes most people's holidays here by the way.