I remember my first trip to Japan (surprisingly as it a long time ago) and my hosts did the round of traditional meals and activities. On the last day, my host looked at me and said 'I think tonight, no chopsticks for you' and thusly we ended up swigging Corona and munching tacos in a Mexican cantina, Tokyo style.
That's one of the least odd things that have happened to me in Japan. I've been the best man at a dog wedding, was once asked to hold a young ladies tentacles, not to mention stumbling into Oktoberfest (in May). Top tip, don't attempt to learn Japanese after four hours of drinking with strangers.