TV news of Skai said that Athens Imperial Hotel in Karaiskakis (Metaxiourgiou) Square is to close, although it does not say exactly when it is going to close.
News on Skai.gr
I used to work in tourism. I don't remember how many times I went there to meet tourists and how many times I tried to sell it to the foreign tour operators. I even went there for an inspection once.
The hotel itself was all right and very good value for money, although it was clearly not up to the 5 star standard (officially it was a five-star).
But the area was/is getting problematic, full of illegal immigrant, drag addicts, and thieves. There always were/are many policemen, but they were just chatting among them as if they had nothing to do with the situation.