E-Chick....you hit it on the money me thinks. At least that's how I seem to get dragged into it. It's a tough job, but fortunately I love to do it.
Hog, it sounds like a good time. You definately got to see some of the city in your short stay, and probably had a great time wandering lost through the alleys and streets. I'm glad you got to see the good side of a good people.
You will come across Japanese that aren't too friendly to foreigners when it comes to allowing you in their bars. It's not so much that they are prejudiced, but more so the fact that they are scared of you and the conflict that may occur should you come inside. Certain bars can get very expensive, and there are also certain etiquettes that are involved depending upon the place. Generally foreigners are not either aware of the high costs, or the protocol, so they don't allow non-Japanese in. This is to avoid the embarrassment they will have when you look at your $1000 bar tab and pass out. Also, if there is a certain theme in the bar, you might not fit in. There is also a very large underground in Tokyo. This underground includes the mafia. It also includes some of the seedier side of life. I've been turned around at the door of many a place, but once I let them know that I speak the language, they usually let me in.....if they don't, then I probably don't need to be in there in the first place. It's probably trouble.
The place you are in looks like a normal restaurant/pub. The gents are most likely normal businessmen, but due to their age are high in the food chain. The female (based upon her clothes) most likely works at their company. Probably an admin girl, or secretary or something. She's out drinking with the bosses (why? because she's pretty of course). Her behavior was very typical. She liked you and wanted to take a roll in the hay with you. Like E-chick says, she probably had dreams and visions of finding out if it's true that some men actually do like to go "down under." In Tokyo, there's not a lot of "game playing" that goes on. People that are mature enough to have sex, have sex. If two folks like each other and want to do it, then by all means, let's go do it.....why waste time with small talk? We have a little joke here. We have a two drink maximum. If after two drinks, the odds seem low of "calling it a night," and heading out the door, then you move onto the next one. That's for guys that are just out to "score." I don't care to behave that way....not really a one night stand kind of person (it's much better after the 3rd, 4th, or 100th round).
It looks like you had a good time. At least you had some good Kraft cheese to go with your wine anyway. You drank free courtesy of some good timing gents, and were hit on by a classy gal that wanted your bod......what more can you ask for?