They looked happy and "very much back together" during the outing, a source told People magazine.
The duo, who previously split in February after dating for one year, first sparked rumours of a reconciliation after Evans and Slate were seen grabbing dinner together in Atlanta while the actor filmed his latest "Avengers" movie.
In the months following their split, Evans and Slate remained amicable and supportive, often praising each other in the press.