Recently I had the opportunity to take a look at the Meilenwerk in Berlin. Built inside an old "Tram Remise" it offers a selection of oldtimer specialists, service providers, restaurants, shops and event locations. It's quite a nice place to spend an afternoon and thanks to well known specialists such as Thiessen you can look at quite exquisite cars. Examples? Ford GT40, Dino 206 GT, Lancia Stratos, Mercedes 300 SL, Bugatti EB110, but also Goggomobil, Volkswagen Käfer (Bug/Beetle), Mercedes 230 SL and others.
All in all the whole setup was actually smaller than I had expected, but still worth a visit.
Possibly due to winter time there wasn't too much "traffic", i.e. people. Whether financially such a project is a success is difficult to judge. At least there are all kinds of such projects popping up in different countries and in Germany alone there a three places where you can find a "Meilenwerk".