Given a travel related situation, and given a specific question about the situation, summarize the question into a title

[EX Q]: I have to ask this because I'm Asian and we don't do any of these things there. I have been living in the UK and Germany for a while and I still can't understand how to do all of that in Europe.

If I don't know what to do, what's the best thing to do to stay safe and not insult people? I was in an awkward situation when I shake her hands instead of hugging. 

[EX A]: When to hug, kiss, shake hands, or even "fist bump" in Europe?

[EX Q]: I am a US citizen who will have worked for 89 days in a Schengen country while on a 90-day tourist visa.

What exactly is my best strategy at US border control? Should I admit to working while travelling, or lie and say I was on vacation?

I fully intend to declare the income earned on my taxes for this year, but I simply want to minimize trouble at the border.

[EX A]: Returning to US after illegally working in the Schengen area

[EX Q]: I am looking to book 2 nights at the Hilton Milwaukee City Center - checking in Saturday July 27 and checking out Monday July 29.

When I try to book a 2 Double Bed room with the Advance Purchase option, it tells me that the night of July 27th will cost $212, and the night of July 28th will cost $183.

Out of curiosity, I changed the search for just one night - July 28th.  The Advance Purchase option tells me a 2 Double Bed room will cost only $122.

(I also tried a search for just the night of July 27th, but oddly it says no rooms are available. Why don't they want to make the room available to people who just want to book Saturday night?)

Why is it that a room on a particular date for a one-night stay costs a certain price, but when part of a multi-night stay it costs significantly more?

[EX A]:
Why would a hotel charge a higher rate when booking more than one night?