Many of us know that Julius Caesar was warned to “beware the ides of March.” But perhaps we don't know that the Ides of March (March 15) was the celebration for the Roman god of war, Mars. It appears however that the booking agent for Petaluma's Phoenix Theater knows that, because its weekend triple bill is enough to scare the bejesus out of most of all-ages suburbia.

First up is the March 12 quadruple bill of Thought Vomit, Entangled, P.M.R.C. and Deceased ($8, 8 p.m.), followed on March 13 with Seeds of Hate and Hypoxia ($8, 8 p.m.) and rounded out March 15 with horrorcore rappers Twiztid, who hail from Michigan, and are appropriately enough signed to Psychopathic Records. Joining them in the onslaught will be Blaze and Kung Fu Vampire ($20, 8 p.m.). Don't you just love subgenres?

On March 12, Petaluma's Mystic Theatre provides rational relief with the Grammy-award winning bluegrass from the Del McCoury band. McCoury started his career in the Bluegrass Boys alongside legendary mandolinist Bill Monroe. The musical style of bluegrass gets its name from that very band. Incidentally, Monroe also heavily influenced local mandolinist David Grisman, who named his son Monroe in his honor. McCoury later formed his own band, which now features his sons, Ronnie on mandolin, and Rob on banjo (21 and older, $25 to $28, 9 p.m.).

That same night Peri's Silver Dollar presents Breakin Bread (9:30 p.m.), the compelling side project from “some of the guys”

from the Monophonics and Vinyl. You can spend the $5 this weekend and find out which guys they are, or see Vinyl themselves next weekend, also at Peri's.

On March 13 the Mill Valley Masonic opens its doors to Lavay Smith and the Red Hot Skillet Lickers ($15 to $30, 8 p.m.). Good thing, too, because the Brandi Carlile show at Petaluma's Mystic Theatre the same night is sold out. Carlile is supporting her most recent album “Give Up the Ghost,” which features contributions from Benmont Tench (of Tom Petty and the Heartbreakers fame) and Amy Ray of the Indigo Girls (who, themselves will be playing in Santa Rosa later this month).

Synchronicities persist when Tom Petty tribute band Petty Theft appears at Rancho Nicasio also on March 13. Petty Theft features the aforementioned Monroe Grisman along with Frontline alumnus Dan Durkin ($12 to $15, 8:30 p.m.)

The scheduled March 13, 19 Broadway show featuring Grateful Dead tribute band Cryptical and hippie-tribe-cum-musical group Moonalice (with former Jefferson Airplane/Starship alumnus Jack Casady on bass) would have been the perfect B-Day present to Phil Lesh (born in Berkeley on March 15, 1940) and Paul Kantner (born in San Francisco on March 17, 1941) except that Cryptical has canceled, leaving Moonalice to go it alone ($12, 9 p.m.).

The celebration of the god of war continues with Black Sabbath tribute band Sabbath Lives at Peri's the same night ($5, 9:30 p.m.) while the Last Day Saloon in Santa Rosa gets in on the action with Australian pop/punk proteges and major label signees Sick Puppies. It's possible that you have seen their video “All the Same” on YouTube, because more than 43 million people have; $18 or $20 at the door and you can see them in the flesh (21 and older, 8:30 p.m.). For a band that has a decidedly punk-sounding name they are surprisingly commercial. Also appearing will be Violent Soho and Boo Radley's House.

For band listings, musical news, music-related gossip or related sightings, contact Doctor.rock@live.com.