I'm pretty sure I shopped there once with my mum
A shopera. It's like they combined shopping with opera. Not just shopping. Not just opera. But a combination of the two, together simultaneously. Shopping while witnessing an opera. Operatic singing while shopping. The two occurring at the same time. Happening in the same place. So that's what a shopera is. Not just the two individual things, but both of them at once.
that does seem like one of the better things