This is not to say that there isn't any data on TIs available.

JLL recently reported that the average TI package nationwide is approximately $30-$50 per-square-foot in Central Business Districts (CBDs) and that TI costs are decreasing as landlords continue to compete for tenants.

Incidentally, that one bright spot in last week's unemployment report -- the 8,000 jobs added for construction in September? A good portion of that number may well have been due to robust build outs by commercial tenants, according to JLL's reckoning in its August report. It pointed out that construction unemployment has declined 20% year-over-year since June 2014, as construction demand grows, while TIs have grown by 14.2% since Q2 of 2013.

Now here's the kicker: according to JLL, Washington DC's CBD has the highest average TI package of $70 per square foot.

Naturally, the increase in TI packages gives tenants the ability to secure more customized build outs. Such customization might new public areas, more access to technology in meeting and collaboration rooms, and open, mobile workspaces, JLL says. Firms without these new finishes, it noted, may find it more difficult to attract and retain younger talent.

Yes that spells Millennials.

The National Press Club doesn't break out demographics of its members on its website, but a recent development shows that it is not unaware of the need of offering incentives to this demographic.

It has restarted its mentorship program this fall and like a growing number of organizations it is positioning the program as a two-way street, with mentees also sharing insights with mentors. And presumably their latest TV and video tech skills.

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Want to know what another city's TI is averaging? Go to the next page to see JLL's chart. It is taken from the company's Q2 Construction Perspective report.