Most community centres/city recreation services/colleges in Vancouver have scheduled programs but allow drop in to fill up spots. Most places allow you to sign up for a 2/3 month session or pay per drop in.

Vancouver Parks and Recreation Programs
Search programs for Coal Harbour, Britannia, Kitsilano, Roundhouse, Trout Lake, Dunbar, Creekside, Mt Pleasant and Marpole here. Use keyword volleyball

Burnaby Parks and Recreation Programs
Search programs for Bonsor, and Cameron here. Use keyword volleyball

North Vancouver Parks and Recreation Programs
Search programs for McDougall here. Use keyword volleyball

Coquitlam Parks and Recreation Programs
Search programs here. Use keyword volleyball

Surrey Parks and Recreation Programs
Search programs here. Use keyword volleyball

Richmond Parks and Recreation Programs
Search programs here.

Langley Parks and Recreation Programs
Search programs here.

BCIT Drop In Schedule
See schedule here.

UBC Drop In Schedule
See schedule here.

Volleyball BC Drop In Schedule (Burnaby)
See schedule here.

6Pack Indoor Beach Drop In Schedule (Richmond)
See schedule here.

Here is an archived schedule for the fall and winter season from 2014.  Always phone to confirm a schedule, especially if its your first time at a location.  Sessions will typically be cancelled for holidays and in the summer.