Not all his post-Russia works were set in North Africa. There are at least two dealing with mid-1920s Paris high life.
First of two examples of Roubtzoff's Orientalist work.
There are at least two paintings, seemingly with the same title, showing jumbled details of Jazz Age Paris. Here is one.
This is the other one I am aware of. The original is large, but this is the biggest image of the whole thing I could find on the Internet. However, I did find a large reproduction in a French automobile magazine, spreading over two pages. I scanned each page segment separately, and those images are below. Click on them to enlarge.