Does exactly what it says on the tin. There are hundreds of offers. You buy 2 you get 1 free! The prices shown are for the total cost of the stay (ie for 2 people for 3 nights) and not per person; a few decent breaks I found for three nights were: -
Hotel Skanste Riga 3* £43.24
Abbey Grange Hotel Llangollen 2* £48.00
The Black Bull Inn York 3* £60.00
Days Inn Hotel Fleet nr Basingstoke £58.00
The New Lyngarth Blackpool £60.00
Loads more so have a look for your own needs/wants. I am tempted by The Black Bull myself actually; I've been to York loads and it is a great city with plenty to do and see whilst there; and we have frequented The Black Bull (hic!!) more than once or twice.