Now it's been about 6 months since I researched San Juan, we spent a precruise night there in Sept. The condado area, I'm guessing about a 10 minute or less ride to the pier has a night life all around the beach front, but it really begins to pick up at 10p.
We stayed at the wyndham condado. It's right on the lagoon and ocean. has several pools, a swim up bar and outside restaurant. There is beach access to a small beach here. You can easily crash this hotel, (no flaming me here guys, just trying to be helpful). I've posted a few pictures of it here, but with the galley being arranged I can't find 'em yet. This was a great hotel to spend the day relaxing. From the hotel you can walk the strip, do a bit of shopping and eat at authentic restaurants, we did.
There is also an excursion to old san juan. it is neat walking the old streets, but as it gets anywhere near dark you wouldn't catch me there. During the day there were some spots, alleys that just appear, and are very unsafe looking. The majority even here still speak spanish, along with the menu selections and the friendly tourism like you fnd in other ports is not here. plus in the middle of old san juan there are a fair amount of homeless and panhandlers, others may see it differently. We STILL enjoyed our time there, if you head twords the pier, or water, in old san juan, you'll see two areas of local vendors and a strip which leads to a fountain of those selling their goods, it was not a bad way to spend our time.
Finally there are several forts to go exploring in. While this was something I've said I'd never do or be interested in, we did this to get off the ship early and early. Surprisingly I hada pretty good time and would do the fort excursion again.
From memory, the bioilluminescent tour was an additional 60 minute ride from the port and transportation wasn't included which was why we skipped it, plus I believe there was a kayak involved. Try these links;
http://www.tripadvisor.com/Attracti...inescent_Bay-Isla_de_Vieques_Puerto_Rico.html
http://www.travelandsports.com/to.htm
http://www.cruiseweb.com/RCIPORTS-SANJUAN.HTM
http://travel.yahoo.com/p-travelgui...juan_bioluminescent_bay_kayak_tour_san_juan-i