"(Do Mormons know that beer is served in the Hereafter?)"
Yes. When Gordon Hinkley died, he met St. Peter at the Pearly Gates. He asked if he could see Joseph Smith. St. Peter got an angel to escort Gordon to a huge white building. He was let in and directed up a stair case. He went up a floor and met an old guy with a flowing beard. "Are you Joseph Smith?" The guy says "No, I'm Moses. Joseph Smith is up a few floors. Wow, thinks Gordo. Joseph Smith is more important than Moses. He goes up the next floor and knocks on the door. Another guy with a beard answers. "Are you Joseph Smith?" The guy says "No. I'm Jesus" Joseph is up on the next floor". Gordon is so exited he can barely wait. Joseph Smith is more important than Jesus! He runs up to the next floor, almost exhausted. He come to a big door and knocks. An old guy with a beard answers "Are you Joseph Smith?" "No, I'm God, please come in". Gordon is so excited, Joe Smith must live with God! God sees that Hinkley is out of breath. He tells him to sit down to catch his breath. God asks him if he'd like a beer. "A beer? thinks Hinkley. He tells God "You know, I've never had a beer, I considered beer drinking a sin". "But, I've made it to heaven and I'm sitting with God. I've always wanted to try a beer. Sure, I'd love a beer!" God claps his hands and shouts "Joseph! Bring us two beers"