Wait, that's a good idea!
Anyway, we will eat out there when the temperature is right. On a sunny, snowless winter day it gets up to 70-80 until the sun starts to get low. We could turn the heat on in the winter, but the electric bill is plenty high enough without that on! In the dead of summer the room is pretty much useless during the main part of the day. With no HVAC run out there we don't have AC. The glass is a special kind that does cut the heat build-up, but that won't help when the outside temps are in the mid-80s and above. But breakfast is a definite option, and I most enjoy it late at night, when everyone around us is sleeping (including dogs) and I can sit out there and read. Didn't get too many books read last summer because it never really cooled down at night. The best part is that about half the year or so we can leave the slider doors open from the house to the sunroom and treat it like a normal room.