Students from Delft have been testing out the effect of smell on nightclub goers. In other words, looking into what effect different types of scents can have when pumped into the air at some prominent clubs in the cities of Leiden, Delft and Utrecht. The question is especially interesting to club owners as ever since the smoking ban, we naturally notice bad smells in public spaces, especially night spots where everyone used to smoke.

Their conclusion was that the slight scent of orange in the air led club goers to stay longer and made their overall experience a positive one. Other scents they tried out: strawberry, peppermint and cinnamon. All of which resulted in increased revenues when they were used, though orange scored higher than all of them.

Now that their research is done, the students have turned their research into a company. They're called Moodscent.nl and the next time you're at a nightclub in the Netherlands and you experience the joy of a slight smell of orange in the air, you know who to thank.