Originally Posted by
Polytonic
Mm, I don't mind spending some time on public transit or walking. My personal interest is more exploring various cafes, eating, and so on. My companions on the other hand, they'll probably want to go hit up the Louvre, Eiffel Tower, etc.
You'd probably prefer Republique's location, your friends the Westin.
For four nights in Paris, you might also look at renting an apartment.