Need overnight rest room at Beijing airport for 3 people- flying in and out of terminal 2

Is terminal 2 hourly lounge open overnight - its says on website it closes at 22.00. Can you transfer from terminal 2 to terminal 3 and then return for connecting flight without visa? There are hourly lounges there that stay open 24 hours. There are 3 of us travelling - how many people does hourly lounges accomodate