How I Met Your Mother Season 3 Episode 10: "The Yips"
After everyone joins a gym, Barney sees Rhonda (the woman he lost his virginity to) there. After learning his performance with her was poor, he loses his confidence with women. He attempts to pick up models at a Victoria's Secret Fashion Show.
Ted: I wound up shame-eating the whole pizza. I woke up all greasy and sweaty. My sheets looked like what they wrap Deli sandwiches in. Maybe I should join a gym. Do you go to a gym? Barney: Well, I go to Total Rip Fitness. But I don't work out there. Ted: What do you do? Barney: I invest