Oh Sandie, I'm feeling mean now...
OK - Serious answer...
CDs out in vanilla world are there largely because they want to blend with normality, not be 'made' or 'outed' even by another CD.
If anyone really wants to meet other CDs, then simply go somewhere you know other CDs who are interested in meeting, will go. Support groups, LGBT clubs and friendly venues and events are where we congregate...
Honestly, I'd be a little freaked with folk getting in my eyeline, winking, twitching eyebrows and flipping watches... just keep it simple...
Katey x