As your name suggests, go to the pub half way through the night and sit near a table of people who look like they've been there a long time and have no intention of moving until they've had a skinful. Often, standing at the bar, near a small gathering of men is good. They talk such rubbish most of the time, but they can sometimes come out with a gem of a line that will spark off a scene or a conversation in your head. I have written sketches and even part of a sitcom based on the ridiculous things that I've overheard. Don't forget to take a pad and paper and of course, don't have too much to drink yourself, or you'll find that you can't read your writing in the morning! I know this all sounds a bit banal, but it can help as you are in a relaxing atmosphere whilst you work. Hope your block lifts soon and good luck with the stories!