Target School Networking

I'm a senior in a Target school for MBB (Top 25) and I had calls with some Bain people even before their first on campus appearance at the career fair. However, it was super crowded and I didn't get a chance to talk to the Bain people, there was a slim chance at the end but I didn't think it would be wise to interrupt them when they were leaving. They do have an info session coming up so I'll try to introduce myself there, but what do you typically talk to them about after you've already had a phone call and got a ton of info from them? Is it okay to talk about non professional topics seeing as we covered that already? Was thinking things like what they did when they were at my school, how they spend their downtime etc ... any thoughts and advice would be much appreciated!