Are these groups 'Pitch Perfect'?

Riff off Spin the Wheel - Random Picker

Pitch Perfect - The Riff-Off

Pitch Perfect' Riff-Off Scene - An Oral History Behind the Scenes on Its 10-Year Anniversary

Resonite on Steam

Jordan Buckley quote: I like to have a drink or two, but I

Total Riff Off (TV Series 2014– ) - IMDb

The Barden Bellas, The Treblemakers & The Bu Harmonics – Riff Off: Mickey/Like A Virgin/Hit Me With Your Best Shot/S&M/Let's Talk About Sex/I'll Make Love To You/Feels Like The First Time/No Diggity

Question: is there such thing as a Riff-Off? : r/acappella

Wavelength board game review - the best party game since Codenames

Im back after two day of not uploading double upload coming soon #shor