Aruba, Curazao or what
 

We are a Miami couple who want to spend two or three days in a place in the Caribbean. We are not interested in the beach but in walking, seeing business, some Are Auba and Curazzao places similar to Saint Martin?

Aruba and Curaçao are nothing like St Martin. Even Aruba and Curaçao are different from each other.
What do you mean by "seeing business"?

yes..sorry, it is obvious that I express myself badly. I wanted to say walk through shopping centers or streets with shops, bars, etc. Watching people is one of the things we like best