Neither. I'm old and I don't want to. Assuming I have to, I'm going trick or treating cos it's over faster

party, but I like both

I like a Halloween party

Both imply that I have to wear a costume, and... Nah.

Sit outside and pass out candy and cocktails.

Whichever has the most candy. I'll tolerate a lot for an amount of candy that I'll regret eating.