A Right not exercised is a Right lost.
That's not entirely true, and definitely not in this context. I also have the right not to quarter troops in my house, per the Bill of Rights, and have never been forced to "exercise" that right. It doesn't mean that I've lost this right.
The Chipotle/Starbucks fiascos have only served to hurt the position of legitimate gun owners (including the legitimate gun owners who were involved in these displays). Most ranges and gun shops won't allow you to walk into them with an uncased AR-15 slung over your shoulder, so why on Earth would someone think that your average coffee shop or burrito chain allow people to do this after they start getting backlash from their customers?
If you want to exercise your right to carry by slinging a rifle, do so in public places that aren't on the grounds of a privately owned business. Because, honestly, your rights end where their rights begin, and they can ask you to leave their business for virtually any reason.
I carry my CCW gun with me virtually every single time I leave my house, and have done so for over a decade now (nearly 100% of the time). Most of my shooting friends are hardcore 2A types, own lots of guns, own NFA items, spend substantial amounts of their disposable income on shooting sports, and just generally love "gun culture"… But, everyone I've talked to on this issue also seems to agree that this sort of display is just asking for trouble, in the sense that we'll lose some of the ground we've gained in recent years.
We had these same talks with the Starbucks situation a few months ago. People wanted to make a stand, and lost ground in doing so. They were pulling out their pistols in the shop to pose for selfies, and carrying long guns with them to order coffee. Sorry, but there's no real reasonable justification for carrying an AR-15 into a burrito shop other than to draw attention to yourself. The problem is, the attention you may draw to yourself is often negative in that instance, and hurts the greater gun rights cause.
EVERYONE here knows that gun rights are a contentious issue. Some people aren't comfortable with guns, and we aren't going to easily change their minds. Many businesses don't want to be dragged into this debate, and have deferred to local laws instead of setting corporate policies on the issue. However, when some gun owners decide to start making their establishments look more like gun ranges than restaurants, the businesses often respond with new policies. And, like with Starbucks, it looks (from what I've seen so far) that Chipotle has worded their response mostly in the form of a "polite request". Most states that allow businesses to ban CCW (Colorado doesn't) also requires the business to post specific signage to that end… Has anyone seen a sign at a Chipotle store so far?