Any Suggestions for Adult Halloween Activities?

Hi all! My boyfriend and I (28 & 27) have lived in Alpharetta the last two years and both years have dressed up and found nothing to do for Halloween! I would love a fun party or somewhere to go dance and have some drinks. We visited mercantile social last year on Halloween and after 30 mins of not being able to move or get a drink, we left. Anybody do anything fun every year on Halloween that they suggest we check out?! Thanks in advance!