The inn that we were staying at wasn't situated in the area with all the big hotels - we were near all the housing. So when we walked to the beach, we saw more local people than tourists. The beach wasn't crowded at all, but it was really pretty.
You can rent beach chairs for $1 until about 4pm. There are venders (ice cream!) who come around.
On our first day, we pretty much stayed on the beach the whole day. When we got hungry, we walked to the street (which is 1 minute away) and along to find food. You can also buy stuff at the convenience stores (I saw about two to three), and if you forget to bring sun block or whatever, there's a Walgreen’s too.
There are promoters handing out flyers, so if you want to check out concerts or parties, you can probably find out about them from some people on the beach.