Sam raises the price of a draft beer by $0.25. Norm pulls out his calculator and determines he'll have to cut his drinking back by 8.7% to stay within his "suds budget". With this info one can deduce the trivial fact that Sam raised the price from $2.85 to $3.10.
The title is a reference to the Rick Springfield song, "Affair Of the Heart."
Carla (Rhea Perlman) walks into the bar with Hank (Don Amendolia) and states that they beat the Oilers 28-3. The Houston Oilers were an NFL football team from 1960 to 1996, when they moved to Tennessee and then became the Tennessee Titans in 1999.