When I started, I had a min. charge of £40, and I was charging £29 for a lounge. I would get calls asking for prices of doing a lounge, and when I explained that the cost was £29, but a £40 min. charge I would get loads of "OK, I'll get back to you".
So I increased my lounge price to £39, and reduced my min. charge to £39, now hardly anybody gives me that line.
And, before anyone chips in - I'm well aware that £39 is far less than a lot of you charge - but I live in the middle of Terraced house city, there's not enough room to swing a cat in half the rooms I do.