There isn't as much dancing on this ship as others, but there is always at least one lounge in the evening for what you're seeking. There is a piano bar, but depending on who is playing there, I'd not call it dance music. But the other lounges provide dance music every evening.
There is quite a bit of "real estate" around the main pool area. The upper deck is really nice as well. While you can't just step into the pool, there are several stairways to get down, plus it's a bit quieter up there. The aft pool, while small, is also nice. If you don't need the pool, just want sun time, I'd also highly recommend the fantail deck on Aloha. Quiet, very few people, but wonderful padded loungers and you have the soothing sounds of the wake behind you.
I wouldn't count on Caracas. They haven't stopped there in almost a year, and I believe the earlier sailings this fall have been changed (they vary - some to Ocho Rios, Nassau or Isla Margarita). You might want to check directly with Princess to see if they've made a change on your itinerary yet.
I love this ship. It's intimate yet still has vibrant energy. Out of Puerto Rico, it's likely to have very lively energy as well.
