'Macworld After Dark' concert open to all Expo goers (MacCentral) MacCentral - IDG World Expo has announced "Macworld After Dark," a free concert sponsored by Playlist Magazine scheduled to take place on Wednesday, January 12, 2005. The event happens right after the end of the day's events at Macworld Conference  amp; Expo, from 6:00 PM to 8:00 PM, at the Moscone Center, the site of the Expo. It's open to all registered Expo attendees.