Crank it up baby!!!......until you can't hear the music then back it off just a bit. It all seems very situational to me. Small room=small amp, what type of music, how close to the speaker, what other instruments are involved...etc.....but we will always play as loud as we can for the situation....IMHO
To quote my lovely wife, "TURN THAT S**T DOWN!!!!!"
To quote my lovely wife, "TURN THAT S**T DOWN!!!!!"