The one in red, in the center, is familiar. She's that (relatively speaking) famous female tetsu. I don't really know what she does though. Appears at JR events? I'd certainly like to see some serious historical documentaries on Japanese railways, but I don't think that's what she's doing.

As for this cafe or any others that have gimmicks other than good coffee, hell no. I was in Akihabara a few times, amongst all the gadget shops there I thought I'd find something interesting, but no. The internet has killed the specialness of most specialty shops.