If you look at the other thread on this topic (in the California and the West forum), you'll find info about the WeHo Hallween Carnival. It is not family friendly by any means and has a reputation for being a booze fest with provocative costumes. We went once and won't go back because it made us so uncomfortable.
The AMC in DtD will be showing Halloween movies -- "Maleficent" (I think) and maybe "Nightmare Before Christmas" (received an email, but the link doesn't work). There will be swing dancing in DtD by the ESPN Zone.
Check the Halloween Superthread in the DL California forum to find out what will be going on at the various restaurants in DtD.