The centerpiece of a large informal dinner should be showstopping, but not showy - or bankrupting.
Then, he had been at an informal dinner in the Hotel Cosmopole.
An informal pre-meeting dinner is usually held at a restaurant near the hospital.
They were almost too ostentatious for what was, after all, an informal dinner.
Instead he had received it like an invitation to an informal dinner at the embassy.
Those who would like to attend the informal dinner may do so by calling 967-6161.
She decided that every night, she would have an informal dinner with a representative or two from a different species.
He will attend an informal dinner Sunday with trade ministers from the 25 countries in the union to discuss the Chinese textile imports.
I don't know what the proper form is, but this is a thoroughly informal dinner anyway.
Indeed, this is the very topic for discussion at the informal dinner with the Heads of State or Government.