Dreaming or Concentrating?

When you get on a Spinning bike are you in the mood to dream or to concentrate?
If you are a dreamer then does music in your Spinning studio help or hinder?
Or perhaps you prefer to Spin in silence so that you can read whilst on board the bike?
Is it a good idea at all not be focussing on your surroundings? Surely not having to concentrate on the immediate environment or time is one of the big advantages of Spinning over riding on the road.  If as a road rider and  you are not concentrating on your position on the road and the proximity of other road users then this can prove disastrous.  Many accidents are caused through these means.  So Spinning may be a good outlet for those who wish to day dream or read whilst on a bike?  Autumn is coming -how many of us have started dreaming about Christmas??!