LeBron James and Savannah Brinson
03/01/2013 at 06:00 AM EST
What happens when the Miami Heat gets challenged to a dance-off with the ladies
? They lose!
That was the case Wednesday night at the Motown Revue Presented by Hublot in Coral Gables, Fla., where LeBron James, Dwayne Wade, Chris Bosh and Ray Allen faced off with their female dates, including James's fiancé Savannah Brinson
With the guests in the house serving as the de facto judging panel and the Miami Heat dancers providing a quick lesson, both teams "did old school Motown-style moves," an eyewitness tells PEOPLE, "but the guys deviated and put their own twist on it, while the girls stuck with their routine."
Ultimately, the ladies were declared the victors. "A joking LeBron grabbed the mic and said, 'OK Fans, the ladies are playing on Friday night, not me!' says the onlooker.
Despite losing to his fiancé, James and Brinson, who got engaged on New Year's Eve
, were beaming throughout the entire event, which raised $1.3 million for local charities and featured champagne by Dom Perignon and food served by Smith & Wollensky.
"When the guys lost to the girls, he made the joke and embraced her for a big kiss," says the onlooker. "They were very loving. Later, when they posed for pictures, he made her laugh and gave her a huge kiss on the cheek. The two seemed really happy from the second they walked in until the second they left. They are very lovely people!"
– Kevin O'Donnell