Borrel, SociaalTank Top Thursday Drinks Posted on 05/05/201716/06/2017 by Secretary Mercurius 05 May During our next borrel it’s going to be lit so be prepared! Summer is coming so put on your tank top! Our Tank Top Thursday Borrel will take place on May 18th at Cafe Mokum. As always, we start at 21:00 and you get a discount on beer, wine and soda.