Re: the baby shower - it's amazing how many places you can go where loud volumes happen where you least expect it. There are several restaurants in my city where I refuse to eat because of the volume level. A local magazine recently did a decibel test at a few of them, and some of them approached 100db. And these aren't nightclub-type restaurants - they're hip/trendy places with a dinner crowd.
I've noticed that about some restaurants, too. The ambient noise level (people talking, dishes banging, etc.) is pretty loud. The spaces are reflective, with little to damp the sound--so they're just noisy. I've often thought it would be a good idea for the restauranteur to add some acoustic absorber panels to the walls and ceiling.