Group oriented material: to engage a whole group?

I find that I have a snag right after opening especially with sets that don't hook immediately. This causes me not to approach sets of more than 2 without a wing (with my wing I know I can split off into individual conversation) So i would like to get some material that can be used to engage a whole group of 2-4 people.

Any advice? Here is what I Use currently:

-Cold read each person

-Ask where they are all from

-Ask how do they all know each other

Not a lot of stuff to work with espeically if the set is not immediately hooking so suggestions for more group oriented material are appreciated.

PS I know isolating fast is desirable but for now I am looking to learn to engage groups.