Crowne Plaza Hotel in Denmark uses an exercise bicycle which creates a power when you use it because it is connected to a generator. The good thing about this machine is when you spend a 15 minutes exercise, you can avail a 36 dollar equivalent meal for free. Each 15 minutes can produce a 10 watt-hour as a supply for the establishment.
Crowne Plaza showed a very unique yet interesting for their clients. While gaining good health through exercises, the clients also share a power suitable for the hotel to use for their electricity. In addition, you can also avail the free meal, though not that big amount but such like that is better rather than nothing.