Marc, I think it's a matter of what makes you happy as a player. If you can hear yourself well enough without an amp and you don't get complaints from the other guys, and you don't have to work your hands to the bone, and you're having an enjoyable time, then don't bring the amp.
When I heard you ampless at Andy's with drums, you were getting through the mix, albeit somewhat undefined, and the club was empty and quiet. Personally, I rarely enjoy playing ampless as I like to hear my direct sound and don't like to play hard unless it's in the spirit of the music. But I have a different setup and style and probably don't pull the acoustic sound that you do.
I don't understand why this is something so many seem to strive for on this forum...