Fear is the secret to happy marriages, lasting friendships, and the final ingredient in numerous madman-created serums. Activate this handy emotion with today’s Groupon: for $54, you get an admission package for two to Zooloween at the Central Florida Zoo on Saturday, October 22, from 7 p.m. to midnight (up to a $108 value). Each package includes the following:

• Two admission tickets (up to an $80 value)
• Two souvenir glasses (a $13 value)
• Two raffle tickets (a $10 value)
• One picture in the photo booth (a $5 value)<p>

The Central Florida Zoo swings open creaking gates to intrepid adults for a spooky evening of dancing, dining, and revelry. Ghouls and guests over 21 years of age can swill $1 beer and $2 wine and mixed drinks while nibbling on a selection of bizarre foods. Participants don disguises to compete in the costume contest, challenge partners to a selection of carnival games, or scream soprano arias on haunted train rides. Live bands and Venue 13 DJ Paul Vaine send music echoing through the zoo, to which guests jig at a zombie ball. Guests recall their fright night with a skull mug and skeleton-hand shot glass to take home as well as with a picture from the photo booth that captures both grins and ghosts giving bunny ears.