You can get food and drink if you don't take the food plan. I wasn't that impressed with their restaurant. Here's a quote from my review:
The RESTAURANT and BAR were convenient and the service was good, but that’s the best I can say for them. We ate lunch in the restaurant twice and dinner once. The restaurant offers table service and sometimes a lunch buffet. The lunch buffet consisted of a very small selection of uninteresting dishes. The day we tried it, they shut down earlier than the advertised closing time. Menu prices for breakfast ranged from US$4.50 for oatmeal to US$7.50 for an omelet; lunch US$6 for nachos to US$33 for lobster; dinner US$10.95 for pasta or small pizza to US$33 for lobster. In our opinion, the food and drinks were mediocre and over-priced. Room service was also available.
El Cid la Ceiba sells an optional all-inclusive plan. We did not purchase it, but noticed on the restaurant dinner menu that three of the eight main courses required a supplement of US$10 or more for those on AI.