Arriving at the Karandish Bus Terminal in Shiraz, you can easily take Snap Taxis to Sayyed Alaeddin Hossein Mosque, the alley next to (west of) the Mosque, and from there follow Rashedi alley, Rashedi 1 alley, 1st alley to the left, and then you'll see Seven Hostel which is the 2nd house on the right with a stone tablet above its wooden door.