There are multiple places in Antwerp, where they accept Bitcoin. Check BTC map. However there's one lovely chocolate / dessert shop as well. They're not on BTC map. But check them out:

www.chocotale.be

https://maps.app.goo.gl/WXrJ5xwsbYvaGn9t8

PS: they have delicious Tucho Dubai pistachio chocolate! :)