First World issues...
Friend A: asks, at least once a month, to go out for a drink. Then has a cup of hot water (takes own herbal tea bag) and says she can't drink anything after 8.30pm. So doesn't spend any money at the pub, but expects to be accommodated.
Friend B: is always very keen to go out for dinner, but won't go anywhere when she has to order after 7pm. If we can't book a table until 7.15pm, she says she can't go. This is when she doesn't have work the next day, btw.
Friend C: will only really talk about herself. Interrupts anyone and steers the conversation back to talking about herself. Frustrating.