Being a 5'1" dude, I compulsively go out to buy clothing that will actually fit OTR that I can wear back in the land of the way too big. Incidentally, I have also discovered that those people who work the floor at retail shops, at malls especially, make the most effortless Japanese conversation and practice partners I've ever had. Bars were probably my first good practice experience, and I still go from time to time, but I'd say it's best mostly for brushing up on slangy abrasive speech.
I tend to see it as making the intense service culture work in your favor... in that role they ABSOLUTELY MUST be pleasant, courteous, and most importantly, not awkward/nervous/standoffish/toocoolforschool.
If you're into giggly 22 year olds, those cute girls that Starbucks Japan insists on hiring will also talk your ear off.