Organizers said many of the women still asked men to approach their families first.
Organizers said 50,000 people took part but the police put the figure at about 20,000.
Where the group goes from here is up in the air, organizers said.
Organizers said the change was made to allow more time to judge each car.
The organizers say about 60 percent of participants are single.
But he and other organizers say they believe that many people sign up for a number of groups at the same time.
Because of that, organizers said they didn't change a thing.
The organizers said the event was a success despite the small field.
Organizers said the meeting may be extended for two or three days.
Organizers said more than 300,000 people a year were expected to visit the complex.