The phrase "have a lunch" is correct and usable in written English.
You can use it to express the idea of having a meal around midday. For example, "Let's have a lunch at the park this afternoon".
You should certainly have a lunch at Katz's.
Monday, I have a lunch date with my wife.
"I would have a lunch at the club, I'd ask is it OK?
Alternatively, ditch the broccoli soup and have a lunch of whipple-scrumptious chocolate instead..
Quite often, we have a lunch or dinner party in the house.
Briarcliff currently does not require students to have a lunch period.
Why not institute a sleep break just as we have a lunch break during the workday?
I would be willing to live on Centre Street in order to have a lunch every day of these blintzes!
Sometimes I'm just sitting have a lunch with friends, I just go on Twitter and see what's happening.
You would have a lunch and then rush off to another restaurant and then do the same at dinner.
"Then some of them went to a club to have a lunch and stayed awhile longer," Mr. Cerrone said.
