The best hotel breakfast I have had (non-room service) is:
Peninsula Bangkok (Tie): for the riverside setting
Four Seasons Bangkok (Tie): for the quality
Best Sunday Brunch (tie):
Peacock Alley Sunday Brunch, Waldorf Astoria, NYC
Sunday Brunch, Four Seasons Bangkok
Best Hotel Afternoon tea:
Service: Swann Lounge, Four Seasons Philadelphia
Quality: Dorchester, London
Ambiance: Le Gallerie, Four Seasons George V, Paris and
Hotel de Crillon, Paris (for the harp music)
Best Hotel Spa Treatments:
La Prairie, Ritz Carlton Central Park, NYC
Spa, InterContinental San Francisco
Spa, Four Seasons Las Vegas
Spa, Four Seasons Whistler