What to do whilst waiting for concert?

[Confusedandfrightened]

Dropping off daughter for a concert at the Nia Birmingham and wondered what I can do for around 4hrs on an evening?! I know the bill ring is close but it’ll be closed shortly after I drop them off. Ideally I’d like to find a Starbucks or similar to do some work in, almost debated the services lol but not sure what to do?
Dreading finding a good place to drop them off and pick up too hope they can find me afterwards!!

*bull ring rather!

There's a Cineworld quite close with a Costa inside. There's a large carpark nearby not owned by the cinema. If you watch a film you can validate your ticket at the machine inside the cinema to get free parking or a reduced fee, depending on how long you stay. The machine is located at the Costa counter inside the cinema. There is off road parking at the rear free after 6.30pm.