Hash bar
Hash bars are very common in 
9 Amsterdam and appear to be really grim cafes where people can go and freely smoke hash. The laws on hash are rather vague in 9 Amsterdam, but it goes roughly like this:
Its legal to buy it. Its legal to own it, and if you're the proprietor of a hash bar, it's legal to sell it. It's illegal to carry it, but that doesn't matter 'cause - get a load of this - if you get stopped by a cop in Amsterdam its illegal for them to search you. I mean, that's a right those guys don't have.
Whilst redundant information to the Colonel's men, who on the whole think that hash smoking is a disgusting habit anyway, these words were quoted several times during Mission 9 9 Amsterdam.
Strangely, they do not seem to sell corned beef hash in their hash bars.