I have a reasonable spl app on my phone. Itsy not be spot on but it does useful comparisons.
Alice Cooper at an arena gig about 20m from the main pa. About 97dB peak.
Typical bands in my local club at about 10m from the pa 90-100dB peak.
Average levels about 10dB down.
The band who needed their valve amps hot to get the right tone - over 110dB.
I suspect it reads high, but seriously, no pub/club band needs to be louder than Alice Cooper.