Grill spots in Copenhagen

Hi everyone, I’m planning a BBQ for around 40 people somewhere in Copenhagen this summer. I’m looking for a place where it’s legal and practical to grill, with enough space for a large group to sit and hang out for a few hours.

Does anyone have recommendations? Are there any places that can or should be booked in advance?

We’re a group of international students, so budget-friendly options are especially appreciated.
Thanks!