Tom Schwartz sings karaoke in Los Angeles amid the drama of the Tom Sandoval case

Witnesses told TMZ… Schwartz was with friends at The Oaks Tavern in Sherman Oaks for some karaoke — he showed the crowd his version of the Green Day song, “Brain Stew.”

We’re told he picked up his group tab on a Wednesday night. It’s unclear how long Schwartz and the gang were out, but we’re told Sandoval was definitely not present.

It seems like Schwartz isn’t exactly bothered by what’s going on with his best friend right now…but he should be if you ask the former “Vanderpump Rules” cast member Christine Dott.

Like we said, Christine – who dated Sandoval years ago – Schwartz pulled out completely calling him a “******** p****” for keeping quiet about his friend’s affair. She claims he expressed his anxiety in texts, but she believes public actions speak louder.

BTW, Schwartz and Raquel have been an item for a while too, having appeared during the current season of the show…so, more drama.

Schwartz was the mom on the cheating case — until Saturday, that is… when he was He sat on the fence About who shows his loyalty…