I vote for downtown meet up and suggest the NAC as a location, being accessible by the LRT, OC Transport, STO and with cheap $1/hr (?) parking within walking distance at the City Hall or free on-street given the proposed meeting date (Oct 22) is a Sunday.
The NAC has many quiet and comfortable seating configurations not affected by performances and community activities. There is no obligation for consumption but there is a Happy Goat cafe onsite and you are actually encouraged to bring your own food and drink. There is even free WiFi if the gathering calls for it.