Which preposition to use with diners

in Occurrences 3%

The table was large and round, the sixty or seventy other diners in the room made a certain amount of noise, so that it was easy to talk in undertones while the conversation of the others was general.

at Occurrences 2%

Re-doubling his attentions to the diners at the farther side of the room, he remained resolutely unconscious of Madame's signals, which were rapidly becoming frantic.

of Occurrences 1%

Niceratus, in the Symposium, is telling the diners of what knowledge he is most proud.

than Occurrences 1%

Never was there a more appreciative diner than he, never a more attentive, sympathetic listener.

Which preposition to use with  diners