Glassroots, a relatively new business at 809 West 39th Street, sells glass smoking accessories. (Which, by the way, seems like a vast improvement; the store formerly occupying that space sold candles, incense and the kind of kick-knacks you'd expect to see buried under four feet of dead cats on Hoarders.)
Glassroots also sells K2, the fake-weed blend that Pitch staff writer Peter Rugg wrote about a few weeks back.
But the sign is so subtle, you guys. Don't bogart the stash.