I'm a regular here. It's good to go on dates, family outings, or even by myself. I'm fairly awful at pinball but love playing regardless, so it's a little bit more expensive for me than it seems to be for others, but I'm more than happy to grab 10-20 bucks in quarters to relive the arcade filled excitement of my youth. Tonight I went and noticed a few new machines including one from the '20s that flips pictures to create a moving scene (pretty neat!) and Tron. My favorite machine? The one you stand on that vibrates violently from the feet up to "rejuvenate" your legs. One of the ladies working behind the desk one day told me that she saw some little girls sitting on the vibrating platform giggling and just had to laugh because they had no idea what the weird sensation was.
Employees do not go out of their way to "serve" you, but are you really coming to the pinball museum to be served? If you have a problem with a machine, they are more than happy to help. I once dropped a bouncy ball that I won under a pinball machine that couldn't be reached and the guy working not only grabbed it with a broom, but gave me an extra for free. :) So no, they are not going to seek you out to be friendly, but they are most definitely not rude as stated in other reviews.
I love the Pinball Hall of Fame and am always happy to pump quarters into the machines. I always grab a few extra dollars in quarters for the fifty cent machines (tonight's haul of comic character figurines was impressive) and popcorn. I could spend all day here if my parties did not always drag me out.