Guys? What if there actually IS rogue order hall?

I was just hanging in Dalaran and I saw rogue who went into the building by the fountain. He looked suspicious so naturally I had to investigate but when I went in, there was just merchant trying to sell me some threads and I could not get a decent word out of him. Cleverly I used my Personal egg camouflage under Rhonin statue to go unnoticed and saw many rogues to walk into this building but none come out. Do you think it's possible rogues DO have order hall after all or am I just hallucinating?