Definitely, the number 1 of the questions asked list. It's located two thirds of the way back, upper level on the opposite side from the park. They charge 300 pesetas for every 15 minutes of internet access. There's another one that belongs to Anfi Beach club on the outskirts of the resort, you'll find it in their shopping mall.
Prices are the same and it's woth spending a whole day down there.
The beach and mall at Anfi are there for the public to use, as well as residents. Other facilities in and around the mall include a restaurant, supermarket, clothes and accessories shops and lots more. If you walk around the main commercial center in Puerto Rico, I've seen 3 or 4 more open up over the last few months so it isn't hard to find one, worry not. Sit in the sun for 4 hours without a break. Check my page on Shopping and Food and that should give you a good idea.