The only reason I can think of for "café" to appear in the "Places" lesson is in the sense of "a café"... but it´s used here in the sense of "coffee". Duolingo needs to distinguish the meanings of words like this!
What you say makes sense. Unfortunately, starting a discussion is probably not going to change things.
From time to time I hit the "report problem" button when I find something wrong with a particular sentence and I sometimes get replies from the Duolingo staff member Ker (http://www.duolingo.com/Ker). Perhaps dropping Ker a polite message would be more effective.