1 Aldwych - t'other side of Waterloo Bridge. I've never stayed there but have had a couple of debauched nights in their lovely bar. Once you've shown that you there for the long haul and there's enough of you to spend a decent amount of money the "reserved" table miraculously turns out to be reserved for you. You sink into their leather sofas, someone keeps producing bottles of wine and you're not allowed to leave til 1 am. I love it.