A whole minute could have easily passed as Shinya looked at the can of beer that Ebizo passed to him, it felt like more as he had an internal battle of whether or not to take it. One more beer would open the doors for another, and then another, and with the current state of his mood, it would be easy to just keep going until he just couldn't any more..
Shinya was smart, but he was only human. So he took that beer, setting his empty can aside and opening the new one like clock work. Conversation happened around him, conversation between two people who were together in one way or another and likely cared about each other.
It was Shinya's turn to feel like a third wheel, and he tried to numb that with beer and feigned unawareness.