If anything, combining "roads" with "public transit" and calling it "transportation" would make the most sense. I really don't see the volume to justify two stickies for that, plus, how would we ever have calm, intelligent debate about transit vs cars? Kidding aside, as much as some might like to disagree, the two items are intricately linked and really feed off each other.
Doing that, it just strikes me that the only change needed would be to make the airport threads sticky (which I think is a good idea regardless). The food and entertainment discussions come up so infrequently that I never even notice them cluttering up the forum.
Here's a pickle: if we have a "Calgary entertainment" thread and a "Calgary development" thread, how the heck do we discuss the most important news story of the century, a replacement for the Saddledome? Virtually any discussion on that topic would cross over between the two threads, and then we'd have groups on both sides whining that there should be a THIRD thread (much like Edmonton has done for their arena discussion), and where does that go? What happens when someone mentions the LRT stations to the Saddledome, do we need thread moderators to shove that discussion into the transit/transportation thread, whereupon the folks there will complain about the inevitable hockey comments? I shudder to think of where a discussion about coming home on the LRT after hitting a really good bar after a hockey game would end up.
Eventually we'll just have both sections looking pretty much identical to the current set up, but with duplication everywhere. As you may be able to determine, I'm not a huge fan of artificial compatmentalization of knowledge. Everything is related to everything else.