Bronny James was teachin' fans how to Dougie at a USC hoops event Thursday night ... dancing his tail off during player introductions -- but he sat out all of the night's competitions, an indication he's still not quite 100 percent after suffering cardiac arrest.
LeBron's oldest son received a super warm welcome at the annual Trojan HoopLA shindig at the Galen Center in downtown Los Angeles ... and he sure seemed to love it all, gyrating to Cali Swag District's "Teach Me How To Dougie" as people in the stands roared.