Consult your local business laws then. Cause legally, that's exactly what it means.

https://en.m.wiktionary.org/wiki/all_ages#:~:text=all%20ages%20(not%20comparable),event%2C%20particularly%20music%20or%20dance)

Notice at the bottom where it delineates that All Ages is NOT the same as Family Friendly, and may not, in facts be appropriate or a good idea for minors.

Sorry to burst everyones bubble, but that IS what the term means.