I suggest clarifying what YOU mean by "Lindy Blues Exchange" so that people will know what to expect in advance: St. Louis bluesmen, Midwest Blues, lots of Slow dancing, Modern Blues, Classic Blues, Non-delta-part-electric-but-not-so-funky-and-Westie Blues, playing all 2, 253 recorded versions of "St. Louis Blues" back to back.... The interpretations are endless, which apparently is what led to the dissatisfaction by some who expected something different.
I know that my interpretation (as a complete outsider who did not investigate it) of the St. Louis Blues Exchange was that it was going to focus on slow dancing. I then considered the type of guys who would be attracted to such an event, then considered the type of girls who would remain and not be scared away by those type of guys, and opted to not go....

(There were other reasons such as timing, distance, job-related factors, etc. as well, so I'm partly embellishing.... PARTLY.)
I have always resisted the inclination to use "Blues Dancing" to refer exclusively to "Slow Dancing," often used for ANY sort of slow dancing, whether it be Blues or not. That's why I have suggested repeatedly using "Slow Blues Dancing," because otherwise it implies that dancing to Blues songs over 100 BPM is not dancing to Blues. (To those who do not think that clarifying definitions is important, here is a case in point where an vague term causes confusion).
I'm somewhat unclear on what this "Funk Blues" stuff is, but if it is what comes to my mind, then it definitely should be limited to novelty-song status.