German phrase
Hätten Sie Interesse an ~?
Meaning
Would you be interested in ___?
When to use it
It politely checks interest. It suits offers and sign-up requests without pressure.
Example dialogue
Hätten Sie Interesse an unserem Newsletter?
Would you be interested in our newsletter?
Ja, das würde mich interessieren. Wie melde ich mich dafür an?
Yes, I would. How do I sign up for it?