Our O/N leadership team has it setup sort of like this... They all work two days of the week guaranteed (say Monday night and Thursday night), and then rotate their middle of the week and weekends with each other... This means that they get off of work Thursday night/Friday morning and don't go back until Monday night! It feels like four days off in a row... but then they usually work something like 7/8 nights in a row before they get their 4 off again!
ALL the O/N TLs at my store work 4 10 hour days either Sunday, Monday, Tuesday, Wednesday or Wednesday, Thursday, Friday, Saturday. At least they always get three days in a row off.
I haven't had 4 days off since before fall semester started... granted I didn't miss any hours since I changed my days off around it, but, it was my 'vacation' before I had to go back to school! Now spring break is coming and I have more than enough vacation to take the week off!! Now I just have to figure out where I am going to go!