I would not do dinner at Mix.....I think it is better for drinks than dinner. If Guy Savoy doesn't work out, Fleur de Lys in the MB is very nice with great food and good ambiance. I'd also check and see how late Bouchon serves; if a patio table is available, it's very nice and great food and drink. In candor, Guy Savoy is likely to run more than 200 per person with wine, where Bouchon will be less with drinks....