Meeting times are determined by individual teams.
Roborodentia is the annual school-wide robotics competition held at Cal Poly during Open House. This competition changes, at least somewhat, from year to year. This year the competition involves stacking cat food cans. One important aspect of this competition is that all robots must be fully autonomous (they must drive themselves without remote control). Robotics club typically contributes about half of the teams that compete, last year supporting 8 teams that competed.
The current rules are at https://docs.google.com/document/pub?id=1t1ih0NEgpuIgmBYwvTLa1-KYK93AxkvXakEps65qcNs.