Lois showed up with a couple bottles of booze (tequila and whiskey) and some dog treats as per requested by the Bats. She also invited Clark along since they're a package deal. After a few drinks she kept and eye on Dick's bar tending skills (as promised) and made some snarky comment about using too much or too little of this or that, but she approved his skills. She mingled with as many people as she could and chatted with the Bats because they are her kind of snark. She even attempted to have a chat with Damian, but if he got rude she just walked away to find something something else to do. She probably challenged someone to a drinking contest (she can drink large amounts of alcohol before it touches, FYI). Then when the party was over she graciously thanked her hosts and bid them a wonderful night.
Vanille also showed up with Fang in tow! She had some drinks, chatted with the Bats because she doesn't really know any of them. She also mingled with anyone she ran into because she's a chatty Kathy and loves people! She brought a ridiculous amount of cat and dog treats (the perks of working for a vet amirite?)