Recently at a "event wrap up" meeting, which we do after most client events, we recevied some very helpful feedback. We listened, we planned, and we reviewed. We brainstormed on how to make things better for next year. We planned a few new features and the client learned a thing or two.
Clients are generally very happy to have a wrap up meeting if they know their input will be received and result in a better product for them.
In this particular case the client suggested a new feature that was already in place, but just did not have the time to learn about it. The wrap up meeting resulted in the client learning more about the product they were already using.
In the end we learned how to make our product better. The customer was happy to build a relationship with us and were happy to be part of the team building a better product. A better result for all in the end.