Is it okay for a girl to break a date if she gets a better offer?

The following happened at a summer camp at Camp Wildwood last summer. I believe it was a girl in my cabin since I heard my camp counselor telling about it. Counselors are mostly college students.

A boy asked a girl to go with him to banquet in the city on the last night of camp before they left the next day and she accepted. Then she was asked by the boy she wanted to go with and she asked the counselor what she should do. The counselor told her she should go with the first boy. However, she went with the second boy and hurt the feeling of first boy.

I believe I know the answer but I want your opinions. Was it okay that she went with the second boy? After all they probable lived in different cities and likely she would never see either boy again.
Is it okay for a girl to break a date if she gets a better offer?
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