For those looking for a treat this Halloween, the four-course mystery dinner on Tuesday, October 29, at Capitol Garage could do the trick. But the dinner is not the mystery: The all-vegan menu (with wine) can be previewed at www.meetup.com/sacvegansociety-org/events/143411272. Diners will be emailed character assignments and “suggested costume” to take part in a delicious plot. Maybe the mystery storyline will be about a society of decaying zombie gnomes, one of whom has gone rogue, wreaking havoc on the others? One can only hope. RSVP at firstname.lastname@example.org to find out. The event begins at 6:30 p.m. at 1500 K Street, and it costs $30-$35 to take part in the food and fun.