German phrase
Ist das für ~ offen?
Meaning
Is it open to ___?
When to use it
It asks who may use it. It politely checks whether a group can use or join something.
Example dialogue
Ist das für internationale Studierende offen?
Is it open to international students?
Ja, es gibt noch Zimmer im Wohnheim.
Yes, there are still rooms in the student dorm.