You are probably packing to come to Madrid already, thereby, I want to share with you just four personal tips to make your conference and visit more enjoyable:
Transportation: Madrid is the capital city for the Spanish Kingdom, a modern and very active city that have a great public transportation system, you can go from Airport to your hotel by using metro, train, bus or taxi, I´d recommend you to get a Tourist Card or a multi-ticket that allow you to use several of them without any problem
Free PDF´s with City Information: In the following link you will get some PDF´s about the city, get it before you come and have fun during your trip :)http://www.esmadrid.com/en/tourist-information-madrid
Almudena Day: Just be aware of this Public Holiday in Madrid, the Wednesday, November 9th, so you will find less traffic and probably some places closed, but is a great moment to visit the Cathedral and the City Center
Last but not the least, our conferences match with the "Madrid restaurant week", one exiting gastronomic experience that you should never miss, have a look on this link for further details http://www.esmadrid.com/en/madridrestaurantweek
I really hope you find this information useful and help to prepare an unforgettable experience, not only within the event but also with the lovely city that host it :)
See you there !