Ahhhh - take a serious chill pill, and enjoy a nice day out at a luxury spa in Lisbon.
This is a great way to kick back and relax after a night out on the tiles. Sweat out those toxins while you have a laugh about the night before. Enjoy the spa facilities for a whole day: swimming pool, jacuzzi, sauna and turkish baths. There's also a bar on site, so you can have a hair of the dog to get you back into the swing of things for the party later on.
Note: the luxury spa is located in the centre of Lisbon.