Rumors of the IllumiGnarly have surfaced throughout history. Some claim that the secret sect of surf-punk rockers have diabolically masterminded infectious guitar grooves since forming in Santa Rosa years ago. Others swear the band produces the most pulse-pounding beats in the North Bay. Well, it’s all true. The four-piece outfit makes face-melting music by shredding throwback riffs in double-time and thrashing about on stages. This month, the Illumignarly present their latest EP, Apocalypse Gnar, with a release show that also features eccentric Sonoma County band Secret Cat and Oakland noise rockers the Acharis on Friday, Oct. 30, at Atlas Coffee Company, 300 South A St., Santa Rosa. 7pm. $5; $3 with costume. 707.526.1085.