A father-of-four had been drinking before hitting a wall in his car near where a party was taking place.
James McIlroy was seen in the vehicle swigging from a bottle of wine just before the crash a court was told.
McIlroy, 32, a former company director, of Edward Street, Thornton, pleaded guilty to driving while unfit through drink in John Street, Thornton.
He was bailed to September 23 for a hearing where both prosecution and defence evidence will be heard by Blackpool magistrates.
Ben Collinson, prosecuting, said on June 1 a party was taking place at an address on John Street and children were on a bouncy castle.
A witness saw McIlroy driving a Renault there and believed he had been drinking at that stage.
About 9pm the witness saw McIlroy return in the car. McIlroy swigged from a bottle of wine, revved the engine, drove off and crashed.
McIlroy had previous convictions for driving while unfit through drink, disqualified driving and failing to provide a breath specimen for alcohol testing.
Kathryn Jamieson-Sinclair, defending, said McIlroy and his wife had recently separated. They shared the car and at lunchtime on July 1 McIlroy went to collect it. He said at that time he was sober. When McIlroy returned after 9pm there was a party taking place but there were no children on the bouncy castle.
McIlroy had heated words with his estranged wife and drove off.