Most concierges want to do whatever it takes to make your stay comfortable and enjoyable. The best part is that the concierge's time and expertise are usually complimentary, though you'll, of course, be charged for items and services purchased on your behalf. Gratuities aren't mandatory but are always appreciated (a simple thank you in person or a sincere email when you return home go a long way, too). Here, some surprising requests that you can ask of your concierge.