I don't really care about weekdays or weekends, but i have quite a lot
of other appointments. Evenings would be very inconvenient for me, I'd
rather meet after lectures/before dinner, at half past 5 or
something.
Location, well, Forum or Bijenhuis I'd say. Bijenhuis has quite a lot
of nice demonstration material, but for newer members it could be more
approachable to do it in Forum.