The thing about laundromats is that they don't have to be boring. Of course they require washers and dryers, but how about adding a decent stereo system, a staffed LN bar or two, some video games or maybe table tennis or skee-ball, perhaps set up an Internet cafe type of structure? Or shelves of books to read and some tea tables or maybe a coffee barista if that's your thing? A karaoke machine, perhaps? Dance floors, hot tubs, and bubble machines might be a bit over the top for laundry day, but whatever it is that you think your town's sims might like would do.
By the way, it has been my experience that in real life there are two kinds of people. Those who say they enjoy doing laundry, and those who are telling the truth. ;)
