When a user enters a chat room, they are then an occupant of that room.

|''with chat''|

|''given''|anna|''is a connected user''|

|''given''|lotr|''is a chat room''|

|''when''|anna|''enters''|lotr|''room''|

|''then occupants of''|lotr|''are''|
|''name''|
|anna|