Junkers G38, an amazing aircraft with passenger seats in the front of the wings, Only two Junkers G-38s were built in Germany. There was room for 34 passengers on two levels.

https://pl.wikipedia.org/wiki/Junkers_G_38

 modified to the meet a demand for the extra passenger space by the addition of a 2nd storey on top of the fuselage, between the wings. A smoking compartment was also added

http://aviadejavu.ru/Site/Crafts/Craft30480.htm

http://hooniverse.com/2014/09/03/last-call-two-dames-and-a-daimler-edition/

http://neon.pictura-hosting.nl/sfa/sfa_mrx_bld/thumbs/500x500/upload/upload_1050/SFA002019907.jpg