Lot's on Dutch side. Free.
Do a search.
I know for a cup of coffee you can sit at Capuccino, Top Carrots, etc.
Jimbo's is free, you can just sit there before they open and no one bothers you.
All the yachties are there.
Atrium is free in the lobby.
I believe Greenhouse has it etc.
French side you need to do a search.
Forum: The Friendly St.Martin Island Forum