John Wall Hits Nightclub After Losing to Lakers, 'No Beef' with LaVar

John Wall wasn't too bummed out after losing his "No Mercy" game against Lonzo Ball's Lakers -- hitting up Warwick nightclub ... and telling TMZ Sports there's no bad blood.

The Washington Wizards star vowed to punish the rookie for all the trash talk his dad, LaVar Ball, had been spouting off leading up to Wednesday's matchup at Staples Center.

But Wall and the Wizards came up short -- losing to the Lakers in overtime -- and after the game, he took out his frustrations at the club!

Wall says he's not holding a grudge with the Balls -- or anyone for that matter -- and focused his energy on having a good time.

As for LaVar ... he celebrated the victory by taking a bow to the crowd. He's loving this.