As you may know, Keith runs a very large singles group: SoCalSingles.com and they were asked by the producers of the show last September to be contestants on a Valentines Day show Feb 14, 2014 where the entire studio audience was single.
The show aired this Friday, February 14th, 2014, Valentines day. Keith was a small part of the first deal and he is in the background the rest of the show.
Here is the link to watch the show online:
Here is a picture of the show. Keith is circled in his big "heart on" costume: