It's quite simple to do, but do not do it when your in a four player lobby, as the Zombies will go after those on the outside and it will get very boring for those inside the dinner.
The following user thanked Xion7200 for this useful post:
tried on PS3 last nite, both of us open the door, but it only let 1 of us go in.. or sometimes, it wont both of us get in... starnge. then tried with 4ppl together, failed! nice glitch though, specially in diner!
---------- Post added at 01:33 PM ---------- Previous post was at 12:30 PM ----------