There still seem to be a fair amount of situations around here where I need to use a check. I use probably 25 or so per year. A lot of it is school or PTA-related. Some small companies/ artist types.
E.G. usually pays the household bills, he's allergic to online bill paying and he still uses checks. So he goes through a lot more than I do.
At least one situation recently changed though (before they only accepted checks, now they accept credit cards) , and there are things you can get to be able to use smartphones to scan credit cards/ accept payment, so checks will probably just keep getting more archaic.
I've heard from some merchants though that they much prefer cash/ check to credit cards. (Well, cash especially, but checks second and credit cards third.) There was a bit of a push locally recently to not use credit cards when shopping at small local businesses -- fees, I think.
Edit: to answer the titular question, two days ago. (School thing.)