There are, of course, plenty of churches that will squabble over whether or not it is appropriate for churches to have events on halloween.
The church I attend is big about Paul's call to do whatever it takes to reach people for Christ. So if the people want a halloween party, we are going to throw a halloween party.
In years past we used to do trunk or treat. It was very well attended, tons of decorated cars, live Christian music, TONS of candy and food.
About two years ago they realized that Trunk or Treat is very backwards. While this was a destination event for many people, it took Christians out of their neighborhoods and left houses that would otherwise be saturated with visitors empty.
Last year they changed things. Instead of hosting a trunk or treat, we have started doing block parties! All that time, money, and energy invested in Trunk or Treat is now invested in helping families put on block parties for their surrounding communities.
To quote our pastor:
"This is a great way to get to know people that you don't know, learn about them, and find out ways that you can pray for them and serve them."