It's not fun. Partial hearing loss is a real problem for a significant portion of every audience.
But there's a simple, inexpensive way to help: a Gentner assistive listening system. All you need to do is connect an ALS transmitter into your existing sound system, then offer a small, wireless receiver to those who need them. Gentner receivers are discreet, pocket-sized and attach to several different types of earphones to suit the user.
The systems meet all ADA requirements. For non-ADA applications, use the Venture Tour Guide series.