Usage patterns
座敷に上がるto step up into the tatami room
I took off my shoes and stepped up into the tatami room.
座敷に呼ばれるto be invited to entertain at a geisha party
She's been called to entertain at a tatami-room party again tonight.
座敷を予約するto reserve a tatami room (at a restaurant or inn)
We reserved a tatami room for the banquet.
座敷に案内されるto be shown/led into the tatami room
The staff showed us to a tatami room.