1912 New York City waiters' strike
The 1912 New York City waiters’ strike began on May 7, 1912 at the Belmont Hotel and was the first general strike for waiters and hotel workers in New York City history. That day over 150 hotel workers walked out as a sign of protest against their poor working conditions.
Source: Wikipedia — 1912 New York City waiters' strike (CC BY-SA 4.0)