There are several casinos on the Dutch side, about half in Philipsburg and the other half surrounding the Airport. Look for various coupons to help fight the odds and have some of the cheap food. There are several nightclubs and shows and again Philipsburg and the Airport have the highest concentrations. There are several discos and night spots at the marina on the French side. Don't look here for any comments.
Shopping is another major activity.
Liquor is similarly cheap and even more prevalent. As some establishments add a bit more of your savings to their bottom line, it pays to comparison shop and maybe even bargain. Jewelry is also cheaper, probably less expensive is the correct phraseology. Again, compare prices and bargain. There are galleries in Marigot, Grand Case, and Philipsburg.