We were not there for carnaval either, so I can't tell you if there would be additional fees. As someone else mentioned, Polina Pizza is very good. Murphy's is also good if you like Irish food. Paillard is another great place to eat. It's half bakery and half restaurant. We had breakfast while we were there. The only thing to watch for there is that they charge extra for EACH thing, i.e. including jelly. We also ate at the main dining room in our hotel, but it was extremely expensive.