Will a dehumidifier dry out the lubricants on my bike? I keep my bike in a utility room at home which doubles a larder, extra storage, a shed, a laundry room etc. etc... It's one of those rooms. But as a laundry room I have a dehumidifier which is running most of the time as there are a lot of people living in my house so there is often clothes drying.

I was wondering if the dehumidifier would dry out the oil on my chain? I try to clean, degrease and relube my chain regularly so I'm not particularly worried about this happening, more curious. But this then got me thinking, would it be of more risk to the areas that don't get treated as often, so lube around cables or deeper into the mechanics around bearings etc.?

Probably one of the stranger questions I've asked about a bike :)
No.  Here's a vague, handwavy descrption of why: A dehumidifier will reduce how much vapour (oil or water, so long as the boiling point and saturation vapour pressure at room temperatureare appropriate) is in the air.  In the case of water, which is in plentiful supply, there's usually enough vapour in the air to affect the rate of evaporation, because there are plenty of sources, both natural and man-made.  In the case of oils, the amount present in the air is so low that reducing it further will have no effect on the amount that can evaporate.

Where the dehumidifier might have an effect is that it blows out slightly warm air (assuing it's working fairly hard).  The extra heat might just be enough to increase the rate of evaporation, but in practice I'd be surprised if the temperature of a bit of bike in the output flow of a dehumidifer could get 5°C above ambient -- much less than leaving it in the sun.