Do you do walk ins?

They do but expect to wait a bit.

As long as someone has an opening.

They have to have an opening available in order to take walk ins but yes. They do take walk ins. If they don't have anything open in their time slots or during their day and they are already busy, then they can't take a walk in appointment. Sometimes there is no wait time if you walk in. Sometimes there is about an hour long wait if you walk in. It can depend on how many people visit each day. So you have to be willing to ask them.