Wednesday night is the busiest night at the Goldengate. That’s because it’s fire night, and because it’s drumming night. A fire rages or smolders in the stone fireplace on the patio, while bring-your-own drummers hypnotize themselves and the neighbors with free-form wallops and throbs. The eatery serves a mostly vegan menu, with some dairy, but the majority of diners are omnivores seeking a healthy meal. They’ll find a good one, and they won’t find the holistic trip laid on in a preachy way.