The most consistently bad category of websites has to be restaurant websites. Too many of them haven’t realized that the rest of the internet moved on from Flash based splash pages in 1997. They’re far to stylized and difficult to navigate. Most damning of all is that many of them don’t work well or at all on mobile devices.
Restauranteurs might have better things to do than become web experts, but someone should stop to consider their audience. I’m not going to visit a new cafe because they have music and a slideshow on their site. More importantly, if I can’t get quickly to the menu and operating hours from my iPhone, I’m going to move on.