I'm not talking Fresh Slice, Uncle Fatih's, etc. But a respectable pizzeria that offers a variety of a few kinds by the slice, where their whole pizzas would garner praise here on CH. Sometimes it's just not viable for us to wait 20-30 mins for an ordered pizza, and even longer if delivered (which I hate delivery pizzas, I actually prefer indiv. slices in the store). Sometimes we'd eat in-store, other times bring home indiv. slices.
We used to patron Amadeus near Granv. Isld and Zaccary's on Oak. Amadeus has since closed, and Zaccary no longer serve indiv. slices. These days I vacillate between Nat's, Ragazzi and Unforgettable (8th & Cambie). But more options the merrier.