Blake will be animated and talk to everyone. He will dance if someone convinces him (which won't take much).
Will is going to be off with everyone if they approach and only pleasant to Ric, who he arrives and leaves with, and the bride and groom.
Rocky will try to be putting on a happy face. She will not say no to dancing with Garret, or any sexy man who wishes to take her on the floor.
Adam will remain with Ana throughout the evening being very pleasant but mentally distant.
Of course Tiger is going to be quite bright and cheerful because he has nothing to be emo about. He will dance with Cissy, Rorie, Blue, Frankie, Rocky, Lyle (if he doesn't get punched). He is there to have a good time, so if you want smiles go see him.
Wesley will, undoubtedly, be invisibly shackled to Roger for the entire evening. Don't expect much sense out of him.