She purchased a folding bike and discovered the same thing I did. Most office buidings in New York City WILL NOT allow any bikes inside. No exemptions. One of the reasons I purchased a folding bike was to be able to bring it inside the office. Unfortunately, I work in one of the most secure buildings in Manhattan so this is impossible.

You have no choice but to leave the folder parked outside. I saw two folding bikes outside the NBC studios by Fifth Avenue the other day so it can be done.

I agree with the junk bike theory in Manhattan. It works well and a cheap three speed or Pacific MTB with two expensive chains works well in Manhattan. All over NYC, are junk bikes attached to poles by the truck loads. Most are rusting and worthless bikes owned by food delivery clerks with little money.