At My school the large lecture classes usually don't require attendance. But some do ask something called clicker questions which uses a device with a unique code to vote A-E. And these questions can count toward your grade.
In Smaller classes under 40 people, there is a sign in sheet or if small enough the teacher remembers who you are. Some classes have stuff thats due at the end of class which works as your attendance and part of your grade.
But there is no point to skip class, nothing good can come from it.
Of course good can come from it. It's the University level. At this point, education is what
you make of it. I've had at least five classes where I learned absolutely nothing from the professor, and learned everything from the class text books or supplemental material. I received A's in these classes, I clearly learned the material and I didn't waste my time sitting through useless lectures.
One professor in particular literally read from the text book. He stood in front of the whole class, staring at the text book reading from it line by line. He probably read a page in 30 minutes. I'm a proficient reader, I can read on my own, why should I be required to sit through garbage like that.
Requiring attendance is completely contrary to the whole idea of higher-education, IT'S NOT REQUIRED I AM CHOOSING BASED ON MY OWN FREE WILL TO GO.
I also hate professors that actually include attendance as part of the grade. As if being a meat bag sitting in a chair should be worth something...