The RZ should have a PC connection, it will be on the lens. Thousands have been used in studios all over the world.
Do you mean the flash has no cord? If that's the problem, a cheap set of radio slaves should do the job.
I'm not sure what you mean by "summery". All accessory shoes are a standard size. If there is a contact in the center of the shoe it will work the flash. BUT! The flash has to be connected to the shutter to synchronize, not the body.
I think "summery" is a mis-translation of "hot". As the RZ model in question has a hot shoe, shouldn't that suffice?
I do use a digital device in my photographic pursuits when necessary.
When someone rags on me for using film, I use a middle digit, upraised.