Namely, Denis and Andre's Belgo in Covent Garden. Unfortunately, I've found nothing like it back home. Fortunately, there's Belgo the cookbook. Equal parts moules, frites and beer, I've been able to bring Belgo home. Their book explains all: where mussels come from, which to pick, which to avoid and of course how to cook and eat them (with a discarded shell).
And while the recipes are quick, simple and delicious, this is more than a cookbook. There's also a beer hunter's guide, Belgian music suggestions while cooking, Belgian jokes and plenty of silly photos of the restranteurs. Essentially a primer on the Belgian good life.
Did I mention it's beautifully designed?