Hi, 
I am just wondering if you mean "Les Caves du Sablon" (http://en.yelp.be/biz/les-caves-du-sablon-bruxelles) which is in Rue des Pigeons 9 or "Le Wine Bar Sablon des Marolles" which is in Rue Haute 198 (http://www.winebarsablon.be/) ? 
Thanks you for the clarification!