Unable to answer "What kind of seating does this place have?" – Casa Trocadéro (Bar) – https://osm.org/node/12027935169 via StreetComplete_ee 61.1:

Il n'y a que Aquarium, le bar, et quelques forains.

Attached photo(s):
https://streetcomplete.app/p/332927.jpg
https://streetcomplete.app/p/332928.jpg