Where he'd take you: Chances are you'd go somewhere nice like a restaurant. Ike is (not suprisingly) the most mature Hanson and because he likes to get to know people, he'd probably take you somewhere a a bit quiet where the two of you can talk. He could also drive you home afterwards - he's the only bro with a drivers licence!
What you'd eat: Ike loves lasagna and spaghetti, so he'd probably take you to an Italian restaurant for a pasta pig-out.
What he'd give you: Ike's a sweetheart, so he'd probably bring you flowers. He also tends to break into song without warning, so if you are lucky he may sing a tune just for you.
Is it serious? Right now, not really - he's not really searching for a girlfriend 'cos Hanson travel so much. However, he does say that he thinks he'd "make a very good and loyal boyfriend", so some girl will get lucky , one day. Also, he's only interested in genuine girls and not just ones who like him 'cos he's famous.