I don't actually think they're doing it on purpose, it's just Murphy's law in action.
Sucks being the last singleton though. When everyone else is coupled off they have no impetus to go out or to stay out when they do. It's shaping up to be a quiet summer.
Right that's the way it seems with me. And it doesn't always happen, it's just staying out and having fun for an evening is getting more rare these days.
And I understand the being single part too. What I hate is having a girls night out and some bring their husbands. Really?