In the present, Blauman shows up a couple hours before the wedding begins and congratulates Robin.
However, Marshall realizes it will be difficult to change the seating plan and recruits Ted's help to avoid creating further issues.
She tells Ted she recently had a bad breakup and is not ready to date, but wants him to finish his story.
Marshall ultimately makes the tie-breaking vote: Blauman stays because Robin wants him to, as she is the bride and has final say over any decision.
In the present, the gang finds Blauman as he is about to drive away, leading Ted to realize he must hold on to the people that matter most to him, as they could instantly disappear from his life.
[1] Max Nicholson of IGN gave the episode 8.7/10, saying that it "delivered a sharp and enjoyable storyline that felt like a snapshot of the show's former glory.