What’s the suggested attire? Emmanuel Okafor Updated April 06, 2019 22:11 Follow The dress code is business casual. We suggest that you bring a jacket or sweater, as some of the meeting rooms may be cold. Related articles Do meals come with my registration? Will I be able to get a headshot photo at ATD 2019? Is there a luggage or coat check? Will there be breaks and time for meals in the schedule? What is the parking information for the Washington Convention Center?