If you can coordinate which bus you'll take to the hotel, why not just meet on the bus? The terminals are not close and I don't see any advantage to change terminals to meet just to then get onto the bus.

In both wings of Terminal one, if you enter at the arrivals level, there's a small windowless area at the back sing posted as waiting/meeting room. It seems to have some vending machines and plastic chairs. The rest of Terminal 1 arrivals isn't much more pleasant, although I think there are a few coffee places. Up on level at departures, there are a bunch of restaurants land side between the North and South check in areas. One level up are a couple more restaurants, IIRC fast food type, and an outdoor observation deck that is used by smokers.