I would never recommend key cards unless you are meeting only one person during your stay...too annoying and too obvious. If you're going to meet her, simply act like you're returning an important message on your phone and wait til the next guy uses his key to get in. It is done all the time. You can also have her meet you in the lobby bar.
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Posted By: bigbustfan
What is the best way to handle meeting a new provider at a hotel where the elevators are key access only for guest rooms? Some of the lobbies are large and busy enough not to draw attention.