For me all Muslims are terrorists. If I see a group of Muslims in the shop that I will not come. And act so I'm not the only one. Shops and cafes will lose income and I think that soon they will no longer service. This is not good but they are to blame.
So are you going to boycott the shops just because they have Muslim customers? That won't be the right thing to do. In most of the countries, the shop owners can't refuse service to anyone based on religion or sexual orientation.
Any law can be circumvented. Cash breaks down or the product will end. You can think of many reasons to give to understand that they are not welcome. They themselves are to blame. I would support such methods.