3 comments after our visit to St Martin in March:
1 J.M Beer, Marina Royale is supposed to be a beer oriented bar, haven't tried it but would be interested to hear from anyone who has.
2 Jean Louis beers are available at Bacchus restaurant, Hope Estate, can buy them to go from the Bacchus Epicerie opposite
https://www.jeanlouislabiere.fr/les-bieres-jean-louis I tried their "La Blonde" and it was pretty good (Belgian blonde ale, they have some other styles).
3 The Casino grocery in Orient Bay had a few unusual beers in bottles as well (a Lindemanns Faro for example), not sure how long they have been on the shelf but might be worth a look.
Hope this helps the beer enthusiasts in the community!
Dave.