Post-breakup London trip. Advice on fun, single-girl things to do!

Since my boyfriend and I broke up I’ve been itching for a break to relax and badly behave. So early February I'll be crashing at a friend’s place in Hatfield, Hertfordshire. During the weekend we’ll be getting a room in central London. I’ve visited most of the regular tourist spots before, so now I’m just looking for a good party. I know I’ll be watching The Sounds play at King’s College and the 1 Big Night Out Pub Crawl looks like it could be fun, but I’m open to other very budget-friendly ideas. I'll only be there for a week. I've searched the archives already and couldn't really find what I need. So please help a girl get over a silly boy, Reddit!