If the weather is dry, we will always put the washing outside, but that's a rare treat at the moment and we're often loath to hang it out before work in the morning in case it rains during the day, so more often than not, we have to use another method.
We've don't currently have our own tumble drier and in our last house, we used 3 airers in our Dining area to hang wet clothes on, but it turned the whole of downstairs into a humid, damp Chinese laundry - it was horrible. When we moved, we decided that we'd only ever use a maximum of one airer at a time inside the house and even then, it would only be for things that couldn't be tumble dried, or if we'd had to rush washing in from outside during a sudden downpour. It has meant that our new house has never become damp and humid, which is a revelation after several years of fighting a constant battle with wiping condensation from the windows.
We do all our washing on one day at the weekend - it's usually 4 loads and includes work clothes, school and Guide uniforms, 2 or 3 pairs of PJs each, 1 double bed duvet & pillow covers and sheets, 2 x single bed duvet & pillow covers and sheets, 2 PE kits, DH's stinky football kit, 8 towels, underwear and casual clothes for me, DH and 2 DDs (10 & 12). All of these loads (2 big blue IKEA bags full!) fit comfortably into the largest tumble drier at the very nearby launderette and it takes 20 minutes to dry the lot, for only £2. Work clothes and school uniform still get a quick iron afterwards (they would probably look fine without, but DH does it without being asked so I'm not about to spoil his 'fun'!), but we fold everything straight from the dryer and hang things up that require it as soon as we get home and find nothing else needs to go anywhere near an iron, hurrah!
We would never turn the heating on just to dry clothes as some PPs say they do, although it would no doubt be cheaper than the launderette, as we like the convenience of it all being sorted in one go and after years of having our Dining area taken over by damp clothes, bedding and towels, we'd rather use the tumble drier - or - as a PP suggested; for clothes which are 'Do Not Tumble Dry', we will hang them up in a room with the door shut and the windows wide open, which dries them in 2-3 hours.
Blimey, I never knew I had so much to say about drying laundry, sorry! 