I'm Overthinking Barber Shops Now

I was watching Avengers: Earth's Mightiest Heroes again last night. This time it was the introduction of Wonder Man, out for Tony Stark's head, a goal I can get behind. There was also a lot of Thor and the Wasp making fun of MODOC's, shall we say, unusual, proportions?

The bit that sent my brain off and running was when Nick Fury brings Captain America to a SHIELD facility set under a barber shop. The ride the chairs down to the facility so Fury can give Cap his motorcycle from WWII back. I'm pretty sure this was a part of SHIELD's set-up back in the '60s comics, and one that carried over to at least the '80s*. This raised some questions for me.

Does it operate as a regular barber shop? When they entered there was only one customer, and he was actually an agent, since after they sat in the chairs, he got up, put on his shades, and went to stand in front of the door. Could I walk in, ask for a haircut, and get one, or would they pretend they were booked solid? Obviously, they can't send any agents down if there are civilians in the store, but how do you keep average folks from randomly walking in cause they need a trim? Does SHIELD hire barbers, or do they train their agents to be able to pass as barbers? Do they just send them to barber college for that, or are there people in SHIELD who teach them? There's weapons training, code-breaking, and how to use a straight razor.

Are all SHIELD agents required to use their barbers for haircuts, or can they go where they please (assuming their haircut meets whatever sort of standards Fury sets). If they use SHIELD barbers, do they have to pay, or is it complimentary? Can retired SHIELD agents still get their hair cut there**, and do they get a discount as well? If the shop has non-agent customers, does the money earned count towards their annual budget? If so, would Fury encourage them to get more customers, so they'd have more funds in case of government cutbacks, or does he want less, so they can request more from said government?

Since I'm sure HYDRA knows where SHIELD keeps its bases, have they ever tried setting up a competitive location across the street, to draw away customers? It lets them keep an eye on SHIELD, if SHIELD does use revenue from the shop towards their work, it hurts that effort, and if HYDRA can avoid doing anything evil, SHIELD can't touch them, so it's a bit of mockery. Naturally, HYDRA wouldn't be able to resist implementing a mind control conditioner scheme, and the next thing you know, Fury smashes through the window blasting stuff with laser pistols, but it'd be nice while it lasted.

* There was an issue of West Coast Avengers where Mockingbird wanted to see Fury and visited such a place. Though it was more of an upscale boutique than a barber shop by that point.

** Assuming any SHIELD agent actually survives to retirement.