Summer Walker and Mariah The Scientist were spotted letting loose in true ATL style this weekend, giving fans a peek into their fun night out. The R&B duo rolled up to Atlanta's iconic Cascade skating rink, serving major style and choreographed moves - somebody call T.I., 'ATL 2' needs these queens in the sequel!RELATED: From Sneaky Links To Pizza Hut: A Look Inside Summer Walker's Relationship Timeline & Dating History (VIDEOS + PHOTOS)Summer Walker & Mariah The Scientist Bring The Vibes To CascadeIn clips shared to Summer Walker's Instagram, she rocked tight jeans paired with a light blue cr...