I always wondered if bars and clubs actually get inspected to check the dB level emitted by their sound systems, some places seem way too loud to be safe for people's hearing.
The maximum level is 102dB over 15 minutes. When I look at the screen in a loud venue (EDM, rock concert, ...), it is usually around 100dB, which more than justifies earplugs.
Free foam earplugs are common too, and they also sell better sounding earplugs in larger events. Personally, I bought custom molded earplugs, the type used by musicians. Expensive (~$200) but in my case 100% worth it: the others I tried tend to fall off, seal poorly, or be uncomfortable, and in the case of the cheapest ones (like the ones you get for free), completely muddle the sound.
I am very satisfied, and I never suffered any kind of hearing loss or tinnitus after wearing these and while not perfectly linear, I could fully enjoy the music. If anything 25dB is a bit too much for "reasonably" loud events and I am tempted to buy extra filters with less attenuation for these events.
For this reason I always have a pair of ear plugs of some kind. Loop Experience, or even just regular foam (depending on the noise level and how well dressed I’m expected to be).