I don't go to Yankee's games, beaches or college bars but if I did, I don't think I would wear either of the outfits I suggested.
Okay, now that we've got you dressed... Sorry to say, but the only help I can offer is from my experience with b-school interviews (for what it's worth!). Those questions you threw out? You're probably dead on with what they'll be asking. I'd recommend reading over your entire application again, specifically your PS and other essays; I was asked questions regarding actual sentences I had written. But overall, assuming b-school and law school interviews aren't too different, I'd memorize some answers to the typical "Why our school? How can you add diversity to our student body?" etc. etc. Just like you're expecting.And relax. Interviews are rarely make or break!
Well I guess for me, how I dress is very much an expression of my personality interests and a suit on something like this is just a bit basic and ordinary.