I'm just a satisfied customer, and this is not a paid endorsement, BUT...
Le Frite Kot at 148 West 4th Street now has a Belgian bar in the courtyard behind it.
Vol de Nuit has the same frites and 100 different Belgian beers to wash them down with. The decor and atmosphere are lovely and romantic and we were very pleased.
Don't know if they're serving the same moules as in Le Frite Kot, but if so... bingo!