Hotel's official name: DoubleTree by Hilton Hotel Sonoma Wine Country
State/province/country: CA/USA
Your status (Gold/Diamond) at time of stay: Gold
Type of breakfast offered (full/intermediate/continental; see wiki): Continental
Taken in restaurant or lounge?: Restaurant
Extra options (e.g., upcharge for full breakfast): Continental is buffet; $5 upcharge to full hot buffet including custom omelettes or apply voucher as $14 toward any menu breakfast
Added your report to wiki?: Yes

Breakfast was high quality. Continental included pastries, donuts, cut and whole fruits, charcuterie (salami and cheeses), cereals, juices; $5 upgrade included bacon/sausage, quiche, french toast, plus omelettes-to-order. Max 2 people per room. Overheard a Diamond guest being told that the same benefits applied.