COSI isn’t just for kids! COSI hosts monthly COSI After Dark, adult-only, after-hours events to let the adults have the run of the place.  This event feature exhibits, concessions and cash bar, and fun! Tickets make a great gift! On Thursday, December 12, 2025, get ready to party like it’s 1999 again… at COSI After Dark: … Continue reading COSI After Dark: Y2K – Fun for adults only!