How loud do you like to play your music?

I personally compare SPL meters akin to the utterly useless
buzzes and beeps I have in my car, I do not need a beep
to tell me my seat belt is undone, nor do I feel the need for a gadget to tell I am listening at 86.3692963db, my listening levels is all done with my shell likes, either side of my head, if it is too loud, I just hit the remote and decrease the quality, if it is too quiet I hit the opposite button and just make it louder. I do like to fill my room with sound (13'x27') during the day as I am not going to annoy anyone (other than the dogs) I use my Oris 150's, but not at a level that gives me any ear ringing or causes my ears to bleed. In the evening (late) I use my single cone speakers and sit perhaps 12' from them, as opposed to my 25' listening positioning during the day.
More power to you if you feel the need to use a SPL meter, I just don't see the need. Music where instruments are plugged in should be played Medium to loud.
Rage Against The Machine played quietly? Nah.

Yep, the chauffeur is still in employ, although the offer
of 'you can park your car in my garage' is proving to be a tough refusal as I like to keep a professional distance between employer and employee.
In fact I am going to insist on the stereo (can it be stereo if the vehicle has 4 or 6 speakers)? being on and playing loudly so I do not hear the idiot beeps.

One could take ones SPL meter to the local pick up bar and
thwap it out when chatting up somebody and one could say with a big smile, 'wanna see If I can get you up to 110db with some serious bed thrashing'?
Her retort could be 'if you can't find my button you'll be lucky to hear me reach 60db! '......................