I am planning to go for a Saturday night away in Bath with 3 girlfriends. Any recommendations of hotel/B&B/hostels which are good and would have twin or quad rooms? I am planning on spending anything up to about �100-120 for the night accommodation.
The Wentworth House Hotel charges �26.25 per person (in a 4-bedded room) for B&B. I found it here: http://www.hostelworld.com
Unfortunately, there are only 2 reviews for the Wentworth House. One is very good but one is very poor, so it's hard to gain any real insight from them.
That website also offers you a choice of 4 hostels. They're all well within your budget and they've all got generally good reviews.