Justin, was happy and shocked to see his best friend. Floo? He would have preferred if she had apparated, now he had to toss up if he wanted to hug her or not. He really didn't want to get floo powder all over his shirt, but he also (Regretfully) decided being best friends, probably meant he had to deal with stuff like this. So he walked over and wrapped his arms around her. Whispering a hey of sorts into her ear, before pulling back.
"Okay who is ready to drink?" He wasn't sure where Ernie was, but he figured he would be there soon.