Oh, my beloved Hamburger Hamlet.  I'd forgotten about the menu being in a spiral binder.  From the looks of it, that's the one I knew in the early/mid '70s.  I'd give anything to see every page, for all the descriptions, and to help in recreating a few things.
The Hollywood Blvd. Hamlet was my first one -- actually, my first food, LITERALLY, in Hollywood.  I'm 99% certain that my friends and I went in there on our first walk from the motel on Sunset around to Hollywood and Highland, and we said, "oh, a hamburger place, let's just try this...".  And history was begun.
Favorite locations were that one, Westwood, Sunset Strip, and I think the one on Wilshire that was I believe a little east of the Ambassador.  Just far enough down there to be considered a "downtown" one.  Oh, and Bedford Drive in B.H.  But hell, though laid out differently, they were all comfortable and welcoming.
I flipped through the entire Marilyn Lewis book, and was (as I nearly always am in such matters) disappointed that there wasn't a lot more detail about some of the locations and menu items.  But there are a few choice morsels.  The book does cover a broader view of their lives together, and it seems to do so pretty well.