This way we know precisely what type of connections/wiring you are working with. I often use Imgur.com They have a good iOS app too. Post back links to your photos here.
It sounds pretty standard though. You will need a secondary speaker switcher/selector since most receivers only have three zones maximum built in. An even better solution would be to utilize a secondary 'slave' amp so the main does not affect the secondary speakers. The following site will help you get started:
I would also read through the following so you get a better handle of what's involved.
My Choice? A newer receiver with zone 2+3 options. Line out from zone 3 to smaller slave amp (~$100). 4 pair speaker selector ($75-100) (~$299-399+) connects to this amp. Your 5th pair could use the 'B' side of the AV receivers speakers A/B built-in speaker selector (or even zone 2). For parties, typically office speakers are used the least IME. YMMV.
Let me know what I missed
I have speakers in 5 different rooms. There are 2 speakers in our downstairs family room two in our office two in the master bedroom and two in the master bath. And in the upstairs family room there are 4 speakers there is also a place to connect speaker wire in that room so I got a receiver and speaker wire and hooked it up but it only controls the speakers in that room as none of the other rooms have places to connect speaker wire but there are panels in each room with speakers that has volume and source options on it. So my question is, how do I play sound out of the other speakers in the house.