Does this location page customers over the intercom if needed?

Yes they do have an intercom and if needed to page somebody because you have lost part of your party they will do that

I've heard some announcements before, but not usually. They actually have a text service, so if, for example, you pay for a bowling lane and it's your turn, they will text you, and in some instances you can cancel or ask for more time by responding.

Yes

YES they do