From the GLSC site:

The best space party in Cleveland is back for 2017! Compete in a space-themed costume contest, show off your competitive side in a scavenger hunt and dance the night away as Cleveland’s own “Tricky Dick and the Cover-Ups” rock the house. Plus, astronaut Greg Johnson will be at the party!

Tickets are required. There will be science demonstrations and a scavenger hunt, too.

http://greatscience.com/explore/events-programs/yuris-night-2017