>Nothing worse than sitting in front of a hot meal you can't eat and being unable to get the waiter's attention.

That would be "Waiter come taste the soup":

https://www.imdb.com/title/tt0094898/crazycredits?item=cz000...

More seriously, it all depends on the "level" of service, and - ultimately - on the ratio waiters/served people, which is usually between 1/6-1/10 (excellent service) and 1/25-1/30 (scarce or lacking service).