Enjoyed our first visit to the Trappe Door, beneath Barley's Taproom on Washington St in Greenville. Has 6 sauces in which they steam the mussels. We tried the White & Bleu (belgian white ale, bleu cheese, bacon and dijon mustard) and Provencale (tomato-based with peppers, fresh herbs, garlic and black olives). I liked them both, and my wife thought the White & Bleu was fantastic. The frites came with our choice of 3 flavored mayonnaises. Felt like we were back in Belgium. And speaking of Belgium, they also offer a number of Belgian beers. These were a little pricey. We tried 2 different draft beers for $8 each, and the glasses were half head. But the atmosphere was great, the service very good, and the only place nearby for such a variety of mussels. We'll be back, but probably will buy a bottle of beer instead.