Given a category and a set of five words, find the word from the set that does not belong (i.e. is the least relevant) with the other words in the category. Words are separated by commas.

Category: social gathering 
Words: place, bar, doorstep, club, outing
doorstep

Category: chocolate food 
Words: brownie, loosen, chocolate cake, fudge, molasses
loosen

Category: moral characteristic 
Words: honesty, loyalty, frank, brash, vittles

vittles