I had put in 2.5 weeks' notice and my boss told me that we were going out to eat on my last day. I had worked for the organization for 17 years, and towards the end I had become fed up with it. I couldn't stomach sitting at a big table in a noisy restaurant, seeing the fake smiles and having people who weren't nice to me act friendly and tell me that they'll miss me. I just wanted to leave quietly and leave everyone behind, so I did. I just sent my boss a text in the morning on my last day, letting him know that I wouldn't be coming in. I told him I wasn't feeling well.
I haven't missed working there. It is such a wonderful feeling leaving a workplace with unpleasant people, knowing that you'll never see, speak to, or otherwise interact with any of them again in your life.