For instance, personal favourite The Prancing Pony has a special menu on: https://prancingponybrewery.com.au/event/winter-solstice-celebration/
However, NOLA in the city is repeating last years "Festival of Darkness" https://www.nolaadelaide.com/events/festival-of-darkness-2/ which seems like a good idea (especially as it's in the city, so if it turns out to be not so good, I'm surrounded by options).