A post here a while back had some video of “slabs” in Houston. Here is a great set called Slab Sunday Off MLK: Pulled up on a mini slab holiday at the Shell gas station by 610 and MLK blvd. in Houston, TX.” The image above and the image below are from that set. The bottom one is from another set of slab pix.
Caption: “T’s throwback Monte Carlooff of MLK blvd in H-Town, TX.”