 Robin invites Rebecca to Carl Yastrzemski s $1,000 a plate tribute dinner. Robin also invites Sam along to brief him on baseball. Third wheel Sam ruins Rebecca s plans for a romantic evening with Robin. But on the way to the dinner, Robin and Rebecca decide to get hot and heavy and Robin unceremoniously dumps Sam out of the limo in the middle of nowhere. The day after, the gang learns that Rebecca and Robin did it, not only the first time for them but the first time for Rebecca in four years. Rebecca and Robin s romantic evening made it s way to Little Wally s Pup and Burger - a greasy spoon - before they did the deed. The evening included Rebecca telling Robin about her sensory romantic button, the song You ve Lost that Lovin  Feeling by The Righteous Brothers. In response, Robin had the song played on his radio station all night. The next day, he brings Bill Medley of The Righteous Brothers to Cheers to serenade Rebecca with a personal rendition of the song. Rebecca is in seventh heaven already, but things are brought to an even more unimaginable state for her when on their next date, Robin tells her he loves her. Rebecca, in her euphoria, wants to celebrate her happiness with her friends at the bar, and invites them all the the place where it all started, Little Wally s Pup and Burger. After the group dinner, Sam and Rebecca are the last two to leave the restaurant. Rebecca needs to step into the ladies room for a second when Sam spots Robin on a date with another woman. What is Sam to do?