Ugh.... you're not going to find much for location pinball in ATL, especially not downtown. Generally, downtown gets pretty quiet at night.
Ormsby's is within Uber distance and, depending on your age, you shouldn't feel too old there on a weeknight. On the weekends it's a college frat fest. They always have one pin (Transformers last time I was there), shuffleboard, darts, indoor bocce, and a decent beer list.
Joystick is a decent pick too, although it's more of a video game place. It's in a trendy part of town, so think about packing some skinny jeans. As Joel stated, you can take the new streetcar there. And, right now, the streetcar is free.