Yesterday I went with DH to local café, all seats outside were taken and there was a group of 4 people with empty cups in front of them. Fair enough I thought, they may be waiting for food. DH and I went and sat inside (we'd rather have been outside as the weather was beautiful). The group of 4 left about 20 minutes later having not ordered anymore drinks or food.
AIBU to think you should vacate your table fairly promptly if it is clear that people are looking to sit down? At least 2 other sets of people looked for seats outside, carrying trays so it wasn't just DH & I that they inconvenienced.
Or are some people just so self-centred they have no idea what is going on around them?