For home students, yes you will meet many new friends in lectures but also in the student unions. My general advice is to be outgoing and open and talk to everyone. It won't be weird. I'm still great friends with a girl I started talking to in the queue for the union in our FW even though we didn't live together or do the same course.
Hanging around with people from halls is the easiest thing, everyone does it. I lived in Wolfson too and we just hung out, ended up moving into a flat with two of them cos you know them all well. For those not in halls the unions are planning more events for home students to meet each other, events in the early afternoon. If you can find someone to crash with so you can make it to evening events, its well worth it.
Also Meltdown, best of luck with your results, and yes, all my medic friends disappeared this year...