Freeman, Orilio, MFI, Customer Impact, Intellishop, SPG, GapBuster, Coyle, some co in Canada with a 9 level test series (if they even let you in as a shopper)
Mystery Guest, to name a few, do either or both. Many have long waits for the reimbursement, and unless you have hotel employment background, its a long shot to get a hotel without a good track record on the fine dining for any particular company.
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“Lying in bed would be an altogether perfect and supreme experience if only one had a colored pencil long enough to draw on the ceiling."
~Gilbert K. Chesterton