For cardio try biking or running on the beach.
Oscar's has plenty of rusty free weights and cable/nautilus type machines.
If you seriously want to lift weights,you will find all the basics +. Maybe a big guy to spot you. However, there is absolutely NO cardio equipement from the last 2 decades. Just a couple of rusted exer-cycles pushed off to the side. No "womens section upstairs" like we read somewhere.
I recommend seeing the island on some crumby old bikes. Its fun and good exercise.