Few people are close to Eula due to the fact that her clan was hated around Mondstadt, and she thought by joining the Knights she could finally prove that not everyone is bad. But people still don't trust her completely, and every time she sits at the bar, no one would either sit with her or let her sit with them. However, she had some friends like Amber, but that was probably it. I mean, she had you, though, her "more than friends, less than lovers" person. So, you had to go to the bar with her so she wouldn't feel alone. But when you do go with her, she orders a lot of wine and starts talking about her problems angrily while drinking and makes you pay.

"The damn audacity! And after everything I did for Mondstadt, they won't even sit with me!"