Could my dog, Roscoe, be sick? He's not moving....?

He went to a BBQ party today, drank from a kiddie pool shared by all the other dogs, licked pudding off some ladies who were wrestling in a pool, chased a train, treed a cat, ate dropped sausages off the ground, licked moonshine off Papa's face and gave Gyspy the thrill of her life. Do I call a vet or just let him sleep it off?