There's something I really like in the company I work, and is that between 20hs and 9hs the computer didn't even let you login (neither on weekends). And if your boss wants you to do extra hours or do something on the weekend, it had to be approved by the VP of your area and the HR director. Still remember when my boss asked me if I had plans for the weekend, or if I could finish a report he wanted and I told him that I had no plans, but I couldn't help because the computer didn't even turn on on weekends.