DTB is the abbreviation for During The Break. In the large breaks on Wednesday and Thursday this means a board member is present between 12:40-14:00 o clock. In the smaller breaks on Monday, Tuesday and Friday, a board member is present between 13:30-14:00 o clock. To see who is present, check the weekly mail (sent out on Sundays). You can drop by to ask questions or have a nice chat (and get a free cup of coffee ;)).