Sometimes I'll stick my amp in the closet (don't close any doors) and exit the room, and turn the corner into the hallway and play out there. Can usually crank things pretty good and hear everything really well. It's either that or stand in the room and have to wear ear protection!
There's no right or wrong and "if it sounds good, it IS good!"
Jim Campilongo said in a video that he sometimes faces his Princeton to the side, pointed off stage, so as not to kill the audience in small rooms. he relies on cranking the small amp and he said usually at one table at the side the amps pointed at someone's getting absolutely blasted with sound and no one stays at that table except guitar freaks.
Also to break in speakers I have been known to put the amp face down on carpeted floors and put a couple pillows over any opening in the back with a little gap for heat ventilation. That way you can whale on it a little harder without deafening yourself.
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