[jonnathanson]

"Friendship takes repeated exposure in mundane situations."

Or, in some cases, limited exposure in exciting or trying situations. I have at least one really good friend that I met on a (in retrospect) comically terrible plane flight. I have some close friends I met on a two-week-long backpacking trip, and some that I met on a summer-long volunteering trip.

Sometimes, if the initial meeting is very memorable or intense, it can accelerate the process. I can't say for sure whether that's possible at a dinner. Unless it's a truly bizarre and memorable dinner.

[WalterSear]

When was the last time you talked to your plane flight friend?

[jonnathanson]

Two days ago.