The unidentified guest said the president and first lady Laura Bush welcomed hundreds of people to the lavish event, People magazine reported.
"The president looked pretty cool," the guest said. "He was a good dancer. He was having a great time."
Also among the reception's attendees was Jenna's sister Barbara and U.S. Secretary of State Condoleeza Rice.
Jenna Bush was married to Henry Hager May 10 in Crawford, Texas, and the White House event followed the couple's return from their Hawaiian honeymoon.
People said John and Maggie Hager, the groom's parents, invited several guests to a popular local eatery following Saturday's affair.