The perception: There's Seattle hiphop and then, on the margins, there's Grayskul. The reality: Grayskul is an integral part of Seattle's current hiphop scene. The explanation: Emcees Onry Ozzborn and JFK make a more sinister brand of hiphop than Seattle is known for, darkened by eerie minor-key melodies, funereal gospel vocals, and stoically delivered wordplay. The conclusion: Grayskul's insidious thump is anxiety inducing—if it doesn't stop your heart, it'll certainly chill it. (Chop Suey, 1325 E Madison St, 324-8000. 9 pm, $10, 21+.)