Some years ago my employer sent me on a week long course in Bournemouth. The course was held in a hotel in that resort. The hotel was air-conditioned and overheated. I vividly remember that this establishment had carpets made of some synthetic material and, as the air was very dry, anyone wearing shoes with synthetic soles (eg. me!)suffered electric shocks every time they touched a hotel fitting which allowed the accumulated electrostatic charge to run to earth (ouch!).
The other painful aspect of this course was excrutiating night cramps. Most of each day was spent in lectures and much water was drunk - both to counter the atmospheric dryness and, possibly, the booorredom!! This, inevitably, led to more visits to the toilet and the loss of sodium. I found that I actually craved salt and, as the hotel salt cellars tended to be blocked I had to resort to going out to buy salted peanuts; and these effectively stopped the cramps.