In Bangladesh, people are not allowed to use bitcoin or any other cryptocurrency. Govt has declared it illegal. The great news is our current Finance Ministry is thinking over it and we will probably be seen Bitcoin legal in the coming years.
In Dhanmondi, there's a cafe namely "The Bitcoin Cafe". Although they don't accept bitcoin or any other cryptocurrency, I see it as a great way of promotion, people will learn more about Bitcoin and cryptocurrency. I have visited this cafe 2 times and asked to pay with Bitcoin but he wasn't agreed.
If a country bans bitcoin then there is no way anyone could fight against that on a public domain and if your government can understand the true inception of bitcoin then they might rethink on what to do with the market if they fully understand the change required in the current market structure and the importance of a decentralized digital currency, i am not sure whether the cafe you are talking about is advertising bitcoin but it will be certainly be a niche cafe and a news grabber for coming up with the unorthodox niche that is not that familiar in your country.