
Kourtney Kardashian and Travis Barker are still rockin' and rollin' like high school sweethearts after having a kid -- 'cause they went to a punk show for some alone time.
The married couple was spotted out at the No Values festival in Pomona, CA last Saturday -- which had a lineup chock-full of hardcore bands that are right up TB (and presumably KK's) alley ... although the vibe they were giving off was totally lovey-dovey.
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Check out these pics/video TMZ obtained that shows them cuddled up and hugging each other while watching the Misfits' set that night ... they're like 2 peas in a punk rock pod.

As you can see ... Kourtney is nestled up against Travis's chest as he cradles her, and it looks like other members of Blink-182 might've been in the mix as well. There's no crazy music blaring here in the clip -- but if you know the Misfits, you know things eventually got loud.

In fact, eyewitnesses tell us Travis and Kourtney eventually left this area -- which we're told was mosh pit-adjacent -- 'cause it apparently got a little too rowdy for the new parents.
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