Only in San Diego

A 4K screening of The Rocky Horror Picture Show with original Magenta Patricia Quinn, a live shadow cast, audience participation and a costume contest is an unusually specific spooky spectacle.

Bring—or simply come see—DIY open-source autonomous cars ranging from tiny 1:28-scale models to full-size vehicles at a brewery.

Creative playtime for grown-ups featuring blankies, snacks and storytime.

Paint and sip while a drag queen hosts nude-figure painting with a DJ.

Help solve the disappearance of “MeetUp Manny” in a Little Italy mystery-and-history team scavenger hunt.

An 18+ Chicano Goth Halloween party for goth rockeros, punk rockers and dark kreechers.

Join the Wizarding Themed Tea for a quiz, potions competition, take-home gift, tea, scones, sandwiches and desserts. RSVP and prepay $93.45; declare dietary requirements when booking because changes cannot be accommodated on the day.

Try Morris dance practice, where beginners can arrive at 7:15pm to learn basic steps and no partner is required.

Learn and perform Michael Jackson’s zombie-themed “Thriller” choreography in a free Clairemont class.