This can be a fairly common look for Hostas by mid/late summer in our area. It can be due to an overlap of slug/snail feeding along with infections like anthracnose. (There is no single type of fungus that causes anthracnose...it's a general name for a group of diseases that cause similar symptoms and damage.)

For now, just trim back any affected leaves, even if it mostly denudes a plant for the short term. Throw out (don't compost) the debris. Coffee grounds can be added to a compost pile, but should not be applied as-is to garden beds. You don't need to use a fungicide, but avoid getting the leaves of the Hosta wet if you irrigate the plants during dry weather. (Water only the soil around the roots, or if you can't avoid getting the leaves wet, try to water early in the day so the foliage dries off quickly. The longer leaf surfaces remain damp, the easier it can be for disease spores to infect.) This is partly why years with wetter weather can have more outbreaks of foliage diseases.

Miri

You're welcome.