Yup. Almost always room at the (small) bar. I would think that if you are there specifically to see the sunset, you'd want to the out further where the view is better, which means you'd want a table. For that, I recommend a res.

If you flip through the pictures on Tripadvisor, you can get a sense of the layout; the bar is right by the entry. It's beachside, and the sunset is viewable from there, but the deeper in you go, the better the view.