Jiang Wanyin and Wei Wuxian
Jiang Cheng was not quite sure who had suggested this "double date" thing, but it had not seemed like a bad idea at the time. Besides, he had seen how excited the idea had made his brother and he was still sticking to his determination not to be the one that hurt Wei Wuxian again. Realistically, he knew there were things that they might have small arguments about -- they were brothers, after all -- but he also knew that there were small arguments that he could avoid by not being so... him.
Though he liked to think that he was doing better, here. If he was not, then would Lan Xichen care about him as he seemed to? (No, his cheeks did not tint a faint pink when he thought of his beloved.)
He got there first and found a good spot for the four of them to sit and waited for the arrival of the rest of his party.