Nightclubs are usually themed in some way. Be it the style of music or the type of crowd that goes there. Like Revs is house music, drugs and dancing; My Aeon is trance music, drugs and dancing; Star bar is B/C grade footballers, the women who like them and drinking. For something nice with your wife I'd see if the Exford still has tango/flamenco dancing on Monday? night. You're both Asian yeah? There used to be Asian nights too, there probably still are. Dream on Queensberry St may still exist, but they ran all different sorts of nights, a lot of Drum n Bass from my experience, nice crowd, not my music.
What are you guys hoping for from a nightclub? Their portrayal in movies isn't generally what happens in actual clubs. Drinking, drugs, dancing and fucking are the common reasons for people to go, but not the only reasons. Given you're already a couple, I'd look for dance classes over clubs. Drinking and drugs, well it may be worth your while, I wouldn't expect any racism at Revs or MyAeon. If you're looking to get sexually adventurous, there's sex and swingers nights out there, not really my thing.
Just don't switch partners if they announce to. Rock, Swing, Flamenco, Tango, Salsa are all fun partnered styles. Find a casual place, go for a month, then move onto the next place.