Champagne Bubblebath’s debut mixtape is a deliciously groovy instrumental ride that perfectly captures its name—bubbly, effervescent, and just a little psychedelic. Led by Polyrhythmics drummer Grant Schroff (with help from bandmates and Seattle guitar heavyweight Jimmy James), the album blends late-’60s rare-groove funk, minimalist garage psych, and golden-era backpack hip-hop beats into ten laid-back, head-nodding tracks.