When you have dinner at Pink's Hot Dogs, you can stop at the Le Brea Tar Pits on the way. They have a museum that has a fee, or you can just walk around the outside for about a half hour and look at the actual tar pits and the free exhibits they have outside. This is what we did, and I think we enjoyed our short, free time there. It was interesting.
Honestly, for your free evening I'd relax in the room. Our free night in Hollywood the guides took us to the Farmer's Market and we wished we would have just stayed back at the room. You won't have this problem, but our
ABD was at Christmastime and it was freezing so we all just hid inside the Barnes and Noble.
But you are going to have an action packed time and will be having very early mornings for ABD. I know it's hard to go, I am very go go go on vacation too, but just relaxing at the hotel might not be the worst use of your time that night.
For the Blue Bayou lunch reservation, I'd try to get one right when it opens. So probably 11 or 11:15. Then when you check in say you'd please like a water table and you're willing to wait for it. It really just makes the whole experience. If you aren't by the water it won't be as good, trust me.
For Hollywood I like Mel's Diner. Its a few blocks from Loew's hotel. The food is very reasonably priced and its just good diner food.
If you have extra days in the area I always like to check to see if anything is going on at the Hollywood Bowl, that's where they do those awesome Disney musicals like the Little Mermaid that had all the celebrity casting.
You could also see a movie at El Capitan or Grauman's Chinese. Grauman's also offers a short behind the scenes tour and they will show you around the historic theater. A movie could be a good event for your down night on the ABD tour. I think ours even ended up offering us tickets for the Good Dino at El Cap. Which was worth seeing because they do epic pre-shows.