Typography and Directory Call-boxes

Last week I visitied Hollywood to take some photos and to get a feel for the place. My most interesting finds were the call boxes with business directories. Many of the businesses were film industry related, mostly agencies and small producing companies, but were not and some I had no idea what they were. One call box had some hair shops, a loan agency, something called 'Adult Supervision,' and something called 'Trulli.' I am wondering what all of these places do, so some further investigation is in store. Other call boxes were for residents, and the mananger's name was John Crawford (which I thought was very appropriate for Hollywood boulevard) for one of the office buildings.
A thought I had concerning this upper level of hollywood that is not seen from street level is somehow making them visible or known. Also the Idea of mapping the 2nd floors interests me, I am not sure where that would go, but it could be interesting.
I was also looking at some of the typography on the shops in hollywood, and to be totally honest, there really was nothing too interesting or special about it. Depending on the type of shop, all of the signs were pretty generic. The lingerie shops mostly had a curvy script sign, the tattoo shops incorperated flames into the text, and the rest of it could have been on any shop. so it was interesting to see the dis-connect between the myth and Idea of Hollywood, and then to see the actual street which really seems to have nothing original, special, or even remotley vital to those who live in the area. which brings me back the the 2nd and 3rd floors. It is more likely that the business that goes on unseen is what actually keeps people besides those involved with the tourist industry on Hollywood boulevard.
I propose a project that collaborates either with the businesses on the upper levels or to somehow address the unseen economy.