One perk that hotels usually sell is their food, specifically hotel breakfasts. According to reviews, TripAdvisor has named this one specific hotel to have the world's best hotel breakfast.
According to Travel and Leisure, London's Park Plaza Westminster Bridge hotel serves a top-notch breakfast for its guests. One guest described it on TripAdvisor as a buffet-style breakfast with heated plates and fresh eggs.
Another visitor, however, was a bit more critical and claimed that one must book a reservation a day in advance or get charged 10£ and ask for a receipt to avoid double charges. One reviewer even claimed the breakfast was "average."