A Mermaid and a Pirate

Hello All, My family are 2nd time cruisers. We went on our 1st cruise last April and had a get time in Key West and Labadee. We have planned another cruise for next July, which will visit Cozumel, Roatan, Belize and Puerto Costa. The girls (spouse and daughter) want to play in the water and hang out on the beach. I have said OK to this, but my requirement would be lunch and a open bar. I have express if we are going to be in Central America/Mexico we need to at least see a pyramid or something historical. Who knows when we would have another chance? They have tended to agree. They have also expressed interest in horseback riding on one of the excursions. Royal has listed some excursions already, but we are confused as to what would meet our needs. Any help or advise would be greatly appreciated. Thanks!