The High Museum turns 100 this year and has scheduled A Haunting at 100 for Friday, October 30, from 6 to 10 p.m. The museum describes an after-hours Halloween party with costumes and art, positioned as a special centennial celebration rather than a routine gallery night.
This is useful to know ahead of time because an evening event at a museum is easier to plan with tickets, dinner and transportation already sorted. The theme also gives you an excuse to see familiar spaces in a different atmosphere. The High's event listing says registration is required, so do not assume ordinary museum admission covers the party.
If next Friday is open, check the ticket page now and decide whether to make it a date night. There is enough lead time to choose a costume without turning it into a last-minute project.