I spent one week late August in Santamar hotel, located in Santa Marta Colombia (in Colombia's Caribbean Coast). I choose that location because it was the only available in my time share company for that specific week. I'd never been in Santa
Nevertheless, it was a very good surprise. First of all, Colombia schools have a different calendar so most of kids are back to school late August so beaches are not that crowded.
Hotel is nice, clean and beach front. There are different options from "all inclusive" to "2 meals a day", etc. which are low cost and very good quality. There are three restaurants so you have several food options for the week. There is night entertainment for adults and kids in the hotel and also in Santa Marta town that you can arrange with the hotel staff. I felt Santa Marta area and particularly Santamar hotel very safe so you can lay down in front of the beach an relax. Beach is excellent, warm water, fine sand and fresh air.