Smart casual for an interview?

Blonde401
It looks like I might have an interview tomorrow (just waiting for them to confirm time) and I'm not sure what to wear for it? It's for working in a bar which is like a pop culture cool kind of kitsch place. The position is for storm trooper (a Star Wars reference) but I think they supply the uniform and there'll be more too it I think.

Can you do smart casual for an interview like this? I'd normally say always dress smartly but that hasn't always worked.

I was thinking smart trousers, shoes and a basic t shirt in a dark colour and maybe a blazer or leather jacket? Don't want to over dress but still want to be smart? Or is that a bad idea?
Updates:
+1 y
It's in my city which is known for being pretty causal, pretty fashionable and cool.
Smart casual for an interview?
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