Mario: Excellent point. There is a time and place for softer/louder music. As entertainers, it is our responsibility to gauge the volume level as well as music style appropriate for the occasion.
My rule of thumb is to always start out playing 'quieter' than what I initially think the audience expects. Contrary to what many people think, playing softer can sometimes be an effective way to 'draw' the audience in. This can suddenly quiet the room down so they can hear you.

Nothing's worse than playing louder and louder to compete with a boisterist crowd.

It doesn't work !
A key to a successful musician/entertainer is the ability to gauge the mood of the audience and use our music to transform the mood of the room. What song set works one night may be inappropriate for another. Every night is different so it's important to stay in touch with the audience's mood & energy level. The key is to maintain spontaneity & flexibility. As musicians, we really do have awesome powers.
