1. A walk on the Southbank.
Stroll along the Thames, thumb the used books on sale, watch the skateboarders and pretend you own the city. There are plenty of places to stop to have a bite to eat, as well as loads of bars including the BFI and the National Theatre.
Tube: Waterloo, London Bridge or Southwark
2. Gordon's Wine Bar.
This dark and discreet, bar is perfect for whispering secrets over glasses of delicious wine. The food's good too, and the location is super easy.
Tube: Charing Cross or Embankment
3. Pedalos in Hyde Park.
Skip the row boats and relax with pedal power. The pedalos are hired by the hour, and during the summer there may be a queue. There are few more pleasant ways to spend a hot afternoon than by slowly splashing around a city centre lake.
Tube: Green Park or Hyde Park Corner
4. A drink at Madison.
This city centre bar is notable for its view of St Paul's Cathedral. And what a view. Bring your date at sunset and prepare to swoon.
Tube: St Paul's, Mansion House or Bank
5. The Trocadero.
Hear me out. Sure it's not glamourous. But what could be more fun than a tenner's worth of tokens, a bag full of jelly sweets and the chance to win a massive teddy bear for your boo?
Tube: Piccadilly Circus or Leicester Square
6. The Shard.
It's a little pricey, but the Shard has a massive wow factor. Top tip, to avoid over-crowding, book for the hour before sunset.
Tube: London Bridge
7. The Geffrye Museum.
The best hidden museum in London, the Geffrye lets you wander through houses throughout history. It also has a beautiful walled garden and a great coffee shop. Bliss.
Tube: Hoxton Overground
8. Hackney City Farm.
Geese, sheep, goats, donkeys and more. An idyll in East London, with a brilliant coffee shop, and the option to buy fresh eggs to take home.
Tube: Hoxton or Cambridge Heath Overground
9. The Aubin cinema.
Snuggly and cosy - with blankets and couches, the Aubin is a cinema with a difference. You can also bring in wine and food from their bar, making it perfect for a low-key date night.
Tube: Shoreditch High Street Overground
10. A drink at Sager and Wilde.
Sager and Wilde is still quite new, but it knows exactly what it wants. Low-key and quietly sophisticated, they serve perfect grilled cheeses alongside even more perfect wine choices.
Tube: Hoxton or Cambridge Heath Overground
11. Play table football at Bar Kick.
This lively Shoreditch bar serves decent beer, and has enough foozball tables to keep anyone happy. If you're further north, then Cafe Kick in Angel has a similar vibe.
Tube: Old Street
12. A drink at Evans and Peel Detective Agency.
This below the radar bar has a touch of intrigue. You'll have to assume an identity, and tell nobody. It's worth it for the mouth-watering Old Fashioned though.
Tube: Earl's Court
13. The Electric cinema.
So super classy, the Electric is a Notting Hill institution. Double-couches, mood lighting, and red velvet everywhere. Ideal.
Tube: Ladbroke Grove
14. Museum Lates.
Choose your museum - the V&A, the Science Museum or the Natural History Museum. Now stay out after-hours, peering the exhibits, doing crafts, and having a bite to eat and a glass of wine.
Tube: South Kensington
15. Have a picnic on Primrose Hill.
Grab your picnic basket and a rug, and take to the Primrose Hill. When you're not pointing out the skyline, keep an eye out for local celebrities like Gwen Stefani and Harry Styles.
Tube: Chalk Farm or St John's Wood
16. Zoo Lates.
Ever wanted to see what the giraffes got up to after dark? During the summer, London Zoo stays open for adults, with food trucks, dancing and of course, the animals.
Tube: Camden Town
17. King's Cross and St.Pancras Station.
A train station? Not just any train station. Follow in Harry Potter's footsteps at Platform 9 3/4's, sip on champagne at the bar, and recreate the opening of "Wannabe" at the next door St Pancras Hotel (where the video was filmed). And if you're feeling flush, the Eurostar is right next to you.
Tube: King's Cross St Pancras
18. Lunch in Brixton Village followed by a Brockwell park walk.
19. Try the maze at Crystal Palace.
Get lost in the maze at Crystal Palace before going to say hello to the dinosaur sculptures.
Tube Crystal Palace Overground
20. Greenwich Observatory.
Take in the stars and the skyline and stop time (metaphorically) by stepping over the Meridian line. What more could you want?
Tube: Greenwich DLR
21. Up the O2.
Test your head for heights by climbing the side of the O2. Sure it might be scary, but it's certainly a talking point.
Tube: North Greenwich