You should also program one of the buttons on the phones so it directly pages everyone in a particular zone without having to press Page, then the buttons required to page a particular area, etc.
If you program this feature code, all phones in zone "1" and the speakers will receive the page without further user interaction.
This is what the condensed page command looks like:
6 3 1
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"Page" 3=Sets + Speakers 1=Zone 1
2=Speakers 2=Zone 2
1=Sets 3=Zone 3
Press Feature *3 to program the feature autodial, select the button that will be the Page button, most likely already labeled Page, and press Feature 631 or whatever you have selected.
Of course, I don't know what kind of setup you'd like to have but hopefully this helps with programming something simple and quick to use.