The 32-year-old DJ and the 23-year-old singer-songwriter were spotted arriving together and walking side-by-side at Soho House in West Hollywood, reported Ace Showbiz.
In some pictures, the rumoured couple appeared in good spirits. Calvin smiled as he chatted with Tinashe on the parking lot. He was seen holding the door for her as they entered the building.
The "How Deep Is Your Love" hitmaker wore a grey tee paired with black pants and shoes.
The "All Hands on Deck" singer, meanwhile, donned a white cap, a loose tee, striped hotpants and white sneakers. She completed her look with hoop earrings and a black bag.
The duo first met back in 2014 when they collaborated for a song called "Dollar Signs".