I was in Portland for training, and had a free night so walked around this area of town. It's not too far from Powell's books, where I had been earlier. It's close to Trimet train line. As far as "safety" of neighborhood, I'd say average for downtown Portland.
I wanted to stop here as I'd been quite the arcade bum way back when, and welcomed the chance to play my favorite game (Donkey Kong) on an original console.
I dropped by around 7:00 PM, my ID was checked at the door as they are 21 and over after 5PM. There are some small lockers where you can stash things before you go in. There is also a machine to buy your payment card. I missed this coming in so had to backtrack when I saw the machines didn't take quarters. I got 600 points for $20, and most games were 10 to 20 points so works out to less than a buck a play, which isn't too bad considering last time I hung around arcades it was a quarter per!
I was so disappointed to see Donkey Kong with an "out of order" sign on it but after exploring a bit, found another working console. Also found Donkey Kong Jr! Well my skills were rusty so never got beyond the first elevator level but man was it fun. Tried out a few other classic games, some driving games, DDR Extreme, and several pinball games. When I left 90 minutes later I still had 200 points on my card.
I did not partake of the bar as I struggled enough without being buzzed! I was there on a Wednesday night, it was not very busy, and I was always able to walk right up to a game.
Weekends might be different, but all I can say is I had a blast.