4:30 is about a good time to ring them, there's also the option of actually going up there with a resume and present yourself nicely, that way, you could leave a good impression and also avoid the chances of catching them during rush hour
Yea they'd much rather u go there, wait with a resume.. but other than that if it closes at 5:00 go there at 4:30-5:00, usually around this time... especially on a friday the store is almost closed anyway.