There are several Sofitels in the US. The ones that I've stayed at are San Francisco (actually Redwood Shores) and Miami (can't miss it as you come in on 9R: it's the one with the blue and red lights). My stays were OK, but I couldn't stand their faux-Francais attitude: "Bon jour, Hotel Sofitel, may I help you?..." (hint: don't try answering in French)