FWIW, if you have access to Amex or Visa concierge through any means, the City Guides are pretty similar for both. (At least, the type and depth of content is. The formatting/look is very different.) If folks want a sample of a City Guide, just shoot an email to the concierge and tell them you're visiting St. Louis or something and want a City Guide. It seems that they pull them off a shelf and can turn them around within a day or so.

Doesn't solve the problem for folks who don't yet hold a card with a concierge service, but this would be the interim solution for anyone who does, IMO.