Obviously, it was a countably infinite crowd of mathematicians.
it appears that this thread is spontaneously periodic with average frequency of repeated comments of 1.08 x 10-8 Hz.

An infinite crowd of mathematicians enter a bar. The first one orders a pint, the second one orders half a pint, the third one orders a quarter pint. The bartender says, “I understand,” and pours two pints.
I heard it with the punchline: “You should really know your limits.”