If you are staying in BREA, theres a few great choices..
I am a total foodie. So respect my choices...
If you are feeling classy, theres a great spot in brea called Taps. Its a fish/steakhouse. Its close to where you'll be staying. Good bar for late night. Its also on a street with Buffalo Wild Wings, BJs Brewery, Brea Improve, (Check For comedians coming to town those weeks).
For fast eats in brea, google "The Hat" pastrami sandwhiches and fries. Itll change your life.
Also GBurger is pretty good. Near Brea. (La Habra I think..) 5 min away.
If you are feeling like driving down to the beach towards Newport- You can hit up my favorite sushi spot in Tustin. Its called Tommy Sushi. Best Galaxy handroll, salmon sushi, poki bowl, baked scallops, etc..
TROYs Breakfast Burritos in Orange CA...
Let me know what areas youll be in and I will go in more detail if need be!