How does the zookeeper discuss xenia (hospitality)?

Are you referring to Dracula?

Yes, in chapter 11

I don't see xenia in the text but here is what is said:

Thomas Bilder lives in one of the cottages in the enclosure behind the elephant-house, and was just sitting down to his tea when I found him. Thomas and his wife are hospitable folk, elderly, and without children, and if the specimen I enjoyed of their hospitality be of the average kind, their lives must be pretty comfortable.

The text says, "Now, Sir, you can go on and arsk me what you want. You'll excoose me
refoosin' to talk of perfeshunal subjucts afore meals. I gives the wolves and the
jackals and the hyenas in all our section their tea afore I begins to arsk them
questions."

I'm assuming you're referring to this paragraph on how a host will give a guest food before asking them questions?