Flowers for the lady (if you were invited by a couple)
If it's a bunch of guy ; nothing
Not unless it is a birthday or other celebration. If in doubt, check with the hostess.
You should never bring a third party to a person's home or someone who has invited you out to a restaurant until you phone them and explain the situation.
if you mean that you have been invited for a dinner with an American family, flowers for the hostess or a nice bottle of wine for the host.
Invite someone else if you can then just ask if she wants to go to dinner with you and whoever else you invited.
Usually, if you were invited to dinner, you don't have to pay; however, it is polite to offer anyway.
"Many were invited, few were chosen." Parable of the dinner of sinners
If you were invited to a birthday party at a restaurant by someone other than the Guest of honour, then check with them. Generally speaking the host is the one to pay for the guest of honour. You should be prepared to pay for your own meal and drinks and bring a gift for the guest of honour unless the invitation says "no gifts" in which case a card is appropriate.
The ISBN of Dinner at the Homesick Restaurant is 0394523814.
Dinner at the Homesick Restaurant has 303 pages.
Dinner at the Homesick Restaurant was created on 1982-03-12.
He is invited to the Murray's house for dinner.
That depends on who is hosting the dinner, and the type of dinner. If you are being invited to a casual dinner at your brother's house, asking that question might be considered acceptable under certain circumstances. If the dinner in question is anything more formal than that, you should not ask. Asking such a question makes you appear to be snobbish and elitist.