Opinions please. Companion restaurant to pizza?

We have a 75 seat successful pizza restaurant in a strip mall with some open spots.

This got me wondering, other than pizza what kind of “companion” restaurant would be a good match?
(Theoretically, or if anyone has experience)

Ice Cream?

I know it’s very vague, but I am interested in hearing any ideas?

I’d say that is going to depend first on your climate.