i had a non-formal interview in a coffee shop ...
"if you were on a desert island what book would you take ?"
"something i haven't read before" i says ...
"what's your favourite type of curry ?"
"probably a tikka masala or something tasty - and not unneccessarily hot ... boring, but lovely"
"meat, fish or veg ?"
"its gotta be chicken, hasn't it ?" says i ....
I'd basically been picked for the job before the daft questions (i didn't take it for other reasons), .... non-formal interviews are really just for them to get a feel for your personality ....
enjoy it.
relax.