It’s time to dress up like someone else, get crazy and party at one of these Halloween bashes:
Barcode: Ghouls Gone Wild with costume contest. Friday, 9 p.m., call for cover.
Blue Lamp: The Jacks, Jackpot, Hypnotic IV and Girl Jam. Friday, 9 p.m., $5 with costume, $8 without.
The Boardwalk: Malcolm Bliss, Category 7, Sexciety and Northern Lights. Friday, 8 p.m., $10.
Capitol Garage: Reggae costume party. Friday, 9 p.m., call for cover.
Club Retro: Tribute to the ’80s show. Saturday, 6:30 p.m., $8 with costume, $10 without.
Delta of Venus: Halloween Costume Ball, a benefit for NorCal Bats Rescue and Education, featuring Spider Friends. Friday, 8 p.m., all ages.
The Distillery: The CUF, Red Tape, Harley White Jr. Orchestra. Friday, 10 p.m., $8.
Empire: Mansion Mayhem with DJ Alazzawi, torture cages and palm readers. Friday, 9 p.m., $10 for 21 and older, $15 for ages 18-20.
Fox & Goose: Halloween costume contest featuring Griffin. Friday, 9 p.m., $3.
Harlow’s: RePossessed with deejay monster mash-ups and costume contests. Friday, 10 p.m., call for cover.
Javalounge: The Ganglians, Sucks, Fatty Acid, Acidpop. Friday, 8 p.m., $4 with costume, $5 without.
Main St. Brewery in Roseville: Smoke, Arden Park Roots. Friday, 9 p.m., $5.
Marilyn’s on K: Black Sabbath/Ozzy Halloween party. Friday, 9 p.m., $5 with costume, $8 without.
Old Ironsides: Annual Dead Rockstars Halloween Show. Friday, 9 p.m., $8.
On the Y: Irritant, Awaiting the Apocalypse. Friday, 8 p.m. $5.
Onyx: Garters and Ghouls with contests and giveaways. Saturday, 9 p.m. Call for cover.
Park Ultra Lounge: Shwayze, Cisco Adler and DJ Skeet Skeet with costume contest. Friday, 9 p.m. $17.50 in advance, $25 at the door.
Sandbar: Rock of Horror with torture chamber, beer pong and costume contests. Friday, 9 p.m., call for cover.
Torch Club: Halloween Bash with Mind X. Friday, 9 p.m., call for cover.