Wendy Williams at the "Dancing With the Stars" studio in West Hollywood. (March 21, 2011)

*TMZ is reporting that Wendy Williams was sued by a concert promoter who claims she was paid $25,000 to appear at an Atlantic City resort, but her conduct at the event “was best described as … ungrateful.”

According to the lawsuit, Williams was scheduled to make a two-hour appearance at The Pool at Harrah’s Resort.  The suit claims Williams hardly mingled with guests and left after only an hour — after complaining how she and her husband wanted to leave.

The talk show host and “Dancing With the Stars” contestant was supposed to take the mic on stage, but instead retreated to a cabana, the lawsuit states.

The suit also claims Williams “disappointed her fans who came out expecting her to host the party,” and alleges she demanded four bottles of Ace of Spades champagne and two bottles of white wine at her cabana.

The lawsuit states Williams and her husband said they wanted to be left alone while they drank.