I love the aftershow party at weddings, its a great chance for people to let their hair down - yes its normally because drink is involved... but people love a good boogie and its a great chance to do some funky creative work.
Disco's can be problematic for us photographers, often its very dark, often the lights are brightly coloured which can cause havoc with skin tones.
I like to add my own light to the disco floor, I love to add a splash of flash to the scene - this allows me to shoot at lowish ISO, a slow shutter speed because the flash will freeze the motion (if thats what i'm after) and an aperture say f11 or f16 which means I can be sure that I will get plenty in focus as I tend too shoot manual focus for this part of the wedding day.
My typical set-up for this is an XT2 or Xpro2 in my right hand, dial in my base settings (I always start at F11, 1/16th shutter speed, ISO 2000), in my left hand is the Fuji EF-X20 connected to my camera by a Canon TTL cable. This set-up allows me to have the flash in an off camera position high up, low down, both of which are very directional. I keep the flash in TTL mode, but switch to manual mode if the camera is having trouble judging the flash exposure. With this set-up I can just pop away, have a dance, have fun and really get in the groups and capture some fun images.
You will see from most of my work that I do like a good B&W image, for me B&W shows the raw image and the emotion within the image, colour can sometimes detract from the content of the image; BUT for me, the disco shots should be in full blown colour - you can see that I don't hold back on this - my choice for all my disco shots is the Fujifilm Velvia film profile with additional clarity and punch added in post production.
So there we are, thats how I shoot disco's - take a look at a few more below.