I had never heard of it until I by chance saw it mentioned on Wikipedia a few years back, and almost everyone I mention it to has no idea what I’m talking about.
There’s one restaurant I know of in Seattle that does a Burns Night celebration, and I’ve been to it every year since I found out about it. They don’t have a piper and you won’t see many kilts being worn, but they have a choir to sing and read Burns’ works and the chef makes several haggises from scratch, and there’s a local craft brewery that supplies a Scotch ale especially for the occasion.
Really, the only failing it has is that the chef insists on serving a rare lamp chop along with the haggis in the main course. Who in their right mind serves rare meat to a Scotsman? 