We really enjoyed staying at Guesthouse WA.
We booked the whole place and had 6 people . Although there are many more beds than this.
Given the type of property it would suit a group of people who may not all know each other well.
Tai to-Ku is a short walk to the station and about a 15 min walk to all the restaurants around ueno. Ueno station is a good place to get to from the airport or if you want to catch the Shinkansen.