Definition: Given a real-life anecdote of a complex ethical situation, generate a suitable title that describes the main event/root cause of the situation. Imagine that the given text is a social media post, and you have to write the title of the post, so the users can decide to read the main text or not.
Input: I'm a university student that lives in a house with 5 other students (two couples, and two singles, all close friends of mine). I spend a large majority of my time with the first couple and we hang out, play games, and watch movies together every night. The others in the house are always welcome, but are usually doing their own thing. 

Last week, the three of us decided that we were going to go to this Folk/Punk night at a rundown bar in town on Wednesday, and we brought it up consistently throughout the week. We invited the others, but didn't really have much hope since it seemed like it was going to be a weird and probably lame show, and they didn't show much interest. No one brought it up to us, or asked when we were going, so we assumed it was just going to be the three of us.

We ended up making a night of it, going to this art market at a brewery before heading to the show, and it turned out to be a lot of fun. Super weird, kinda uncomfortable at times, but it was good to get out of the house and try something new, and the music was better than we had expected. 

Since it was a Wednesday, and we had early class in the morning we were back to the house by 11. Two of our roommates were sitting on the couches talking, and looked unhappy when we walked in. We tried to tell them about the night, but they straight up ignored us and went to bed, only saying goodnight to each other, and acting really cold. This was odd, because like I said, we're all good friends who usually catch up at the end of the day. 

Today I found out that the reason they were acting so weird is that the one of them was apparently planning on coming with us, and was mad that we had left without her. 

So AITA for leaving, even if we didn't know she was planning on coming?

leaving for a music show without my friend