Sydney (and Jesse I'm assuming!)
Syd'll be there! She brought Doc a bottle of NICE whiskey and put on some flannel and jeans to fit the "theme". They also brought Dol, her large black dog/shadow. Sorry Jo? He's very well trained and will stay outside with all the people grilling and make ALL the friends with people. He doesn't wander off without Sydney so he's unleashed and pretty well behaved all around.
She'll mingle around with a beer in her hand and can put away a LOT of alcohol without feeling it (she also subscribes to the iZombie life of hotsauce on everything so feel free to be like "really" @ her and she'll shrug) and is down for dancing when that pops up. Happy Birthday Doc!