Do you know how many days a Jewish wedding is celebrated?

My friend wants to do everything "right" and wonders how long her out of town family members will be in town (so she can make reservations, etc.). She isn't real observant, that's why she told me to ask Answers. (Please don't tell me she should call a rabbi to find out, as she feels a little guilty that she hasn't gone to temple in a long time. Also, she is not real close with her family members, who would've been glad to help her I'm guessing.) Thanks for any info or trivia you can give me on the subject.