If you want to take a girly trip, I suggest two really nice hostels: the Generator Hostel and the Clink Hostel London. Both of them have a dressing-table for each guest with a mirror, a hair dryer, beauty lighting – everything girls need! The Clink Hostel even offers you extra coat hangers, just to give you feel like a star ;-) Price are still not expensive since you can get a bed in a female dorm from £10!!!

If you really want to go a little further, I know that for example...