Cross reference
Acts 20:8
8 And there were many lights in the upper chamber where we were gathered together.
Acts 1:13
13 And when they were come in, they went up into the upper chamber, where they were abiding; both Peter and John and James and Andrew, Philip and Thomas, Bartholomew and Matthew, James `the son' of Alphaeus, and Simon the Zealot, and Judas `the son' of James.
Luke 22:12
12 And he will show you a large upper room furnished: there make ready.