Hi John, Janet - looking forward to seeing you, albeit for only a day. Here's a brief guide to East Tokyo.
See this annotated Google Map. I tried to mark everything below on it.
Your hotel, the Abest, is a "business hotel" in Kyobashi. Business hotel is code here for "functional and basic". When I stayed there in Feb, it was typically clean but cramped, but the duty manager spoke good English and I thought the shower and bed were pretty nice, and wifi worked fine too. I ate breakfast in the Ginza, but the hotel did have a breakfast option. There are several "combini" convenience stores near the hotel, and you can get drinks and meals there. Typical ones are Lawson, 7-11, Family Mart, Mini-Stop. Quality is high at the combini here, so there's no worry about getting ill like you might from a 7-11 burrito in the US.
Kyobashi is east of Tokyo station, extending down to the Ginza area. You can get the Ginza subway line at