In context of overlay "Places" – Bodybar Pilates (Gym / Fitness Center) – https://osm.org/node/4885832023 via StreetComplete 63.0:

338 and 340 are merged into a single unit under the number 340. Bodybar Pilates occupies the combined space

Attached photo(s):
https://streetcomplete.app/p/332765.jpg