Torunn is there and is one of the hosts. She will be running around to make sure the wine keeps flowing, people are having fun, and talking to everyone. Will have a drink in her hand the entire time.
Bonnie (dress only) never says no to a good wine opportunity, so she probably went for a while, possibly with Enzo to take advantage of the drinks and dance floor. She's got to make stops at different coven events, etc., so probably arrives later in the evening.
Rory has one of the wines on the list, so she will be there. She will definitely take part in knife throwing and will at least try some of the solstice activities.
Roz will be going after checking out Solstice activities in the city and some of the covens. Will be all to happy to drink, eat, dance, and chat with whoever.