The servants had 4 daily meals: Breakfast, Lunch, Tea and Dinner. This is clearly shown in the 2012 Miniseries Titanic. It was all very simple, but they had their own pantry next door. The Postal Workers and Marconi Operators Saloon was next door on the other side.
The only other popular culture to feature the Maid's and Valet's Saloon so far is the upcoming video game Titanic:Honor and Glory.