the meaning of "pall upon""I'll shake you""hosses"and"salon"

"Ah, mon Princesse," sighs the Count Pumpernickel, stooping and whispering with eloquent eyes into her ear. "You are too hard upon us. Balzac says, 'All women are not to themselves what no one else is to another.' Do you not agree with him?"
"Cheese it!" says the Princess. "Philosophy palls upon me. I'll shake you."
"Hosses?" says the Count.
Arm and arm they go out to the salon au Beurre.
------ O. Henry Tracked to Doom
What’s the meaning of “Philosophy palls upon me.”? Does it mean “don’t say such kind of philosophical words”? What about “I'll shake you”, “Hosses”, and “salon”? It is quite strange that after a short conversation they go out arm in arm. Why?

Link of the whole story: http://www.literaturecollection.com/a/o_henry/130/