I have a feeling I might get flamed for this.
Every Thursday after work me and a few friends from the office try a different restaurant each week. All of us are foodies, we like to dine out and try different cuisines, and have a few glasses of wine etc.
Last week however I'd planned to give it a miss because an old friend of mine, who I know from my home town since our teens, was meeting me after work. I work in a major city so the plan was to show her sights and have dinner/drinks just the two of us. My old friend knows how I usually spend my Thursday evenings, and when she arrived she said she'd like to meet my friends at work and tag along. Instantly, I felt this wouldn't be a good idea for a few reasons.
A) She's an extremely fussy eater, I'm not over exaggerating, there's only a handful of dishes she'd be prepared to eat. She isn't very open minded about trying different cuisines, the most "exotic" food she has eaten is probably a pizza. My friends were going to a Malaysian place that night, and knew she'd turn her nose up at it.
B) She's quite stingy. Whenever I've gone out for something to eat with her before, it's always been at this one pub in our hometown, she won't go to the other because the Fanta there is £1 dearer (seriously). She thinks dining out in general is a waste of money. Malaysian restaurant is quite expensive.
C) She's quiet and timid around new people. She's absolutely fine with me when it's just us, but that's only because we have known each other since secondary school. My friends at work are a lot more talkative and opinionated. With the best will in the world, I just felt like she wouldn't fit in well.
I told her they were eating at said restaurant tonight and subtly mentioned it was quite expensive. That was met with a "Oh well I'm sure they'll be something on the menu I'd eat". I wasn't sure what else to say at that point, so went along with it.
We get there, quick introductions and start to order drinks. We all decide to share a few bottles of wine. My colleague asks my friend what sort of wine she's likes. Friend just orders tap water and says "Oh I'm not drinking tonight I can't afford it". Awkward. She can afford it she's just ridiculously tight with money, the bottles on the menu were reasonably priced. I brushed it over and told her not to worry about it I'd cover it, but she decided to stick to tap water. Menu's arrive and she turns her nose up at everything, complains that all the dishes look too 'complicated' or expensive. In the end she asked the waiter for a simple vegetable dish (that wasn't on the menu) with no spices.
The food arrives, we're all drinking wine and trying each others dishes in a tapas style set up, while she's sat there with her tap water and pushing her vegetables around with her fork, not really engaging. In the end she left half her food. My colleagues tried to bring her out her shell, but she wasn't talking much, and when she did she was very quiet. I think they were beginning to find her hard work.
At the end of the meal we all fancied some coffee, all of which was Asian style. My old friend wanted 'normal' coffee, and said if everyone else was getting coffee there she'd go the supermarket next door and get a takeaway one from the machine and bring it back! 
My colleague told her in the politest way that the restaurant might have an issue with someone consuming drinks that weren't bought on the premises. My friend just pouted at my colleague then looked back down on the menu and tutted. At this point there's a lot of tension and my colleague looks to the rest of us as if to say "What did I say that was so wrong?"
We'd usually split the bill equally but she decided to only put down what she'd spent (fair enough, she'd ordered a lot less than us and didn't drink). But she counted everything down to the last penny, and she asked how she'd go about getting her 70p change, as she only had notes and £1 coins on her 
She also didn't contribute to the tip because she didn't like the food.
This morning I've received a Facebook message from her saying that last week was fun and that we should all do it again the week after next! Fun? She was difficult all night and barely said a word. It didn't look like she was having fun to me.
AIBU to not invite her again?