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: emotional status 
Words: worried, angry, jack, fret, emotional upsets
jack

Category: chocolate food 
Words: fudge, chocolate cake, pudding, unwarranted, heavy
unwarranted

Category: social gathering 
Words: dance hall, grilled cheese, place, team, club

grilled cheese