New Chocolate Life member Ian Boyd
[sorry about that Ian, Donald; if I take a look at the time when this was posted it was way past my bedtime] is planning trips to Las Vegas and San Francisco in the near future and is looking for recommendations for a "sommelier guided chocororgasm experience" in both cities.
Now Las Vegas is a weird kind of place, and much of the really good chocolate is going to be in the hotels, and in the form of pastries. There does appear to be the requisite Vosges, Teuscher, and such like, and of course there is home-grown Ethel M. But for over-the-top experiences, the hotels in Las Vegas are your best bet. Unlike New York where everything is walkable, there do not appear to be any chocolate tours of Las Vegas.
From my research, the one place that seems to be mentioned over and over that is highly rated is the Chocolate Swan
in the Mandalay Bay. Apparently the eclairs are to die for and there is mention of a $15 three-flight chocolate and wine pairing option on the menu.
Other choices include:
Postrio at the Venetian
Jean-Philippe and Michael Mina at the Bellagio
Payard Patisserie next door to the Bellagio
Frederic Robert at the Wynn
Anybody care to weigh in on San Francisco?