We know, the actual logistics of booking a room don't sound very sexy at all – but it is. It really, really is. The Hoxton Holborn makes this list because you can book it for the daytime. You can check in at 10am and check out at 4pm, so it's a prime spot for a spontaneous whirlwind fling. And aside from that? It's a pretty decent spot (even if you're just there for the afternoon). The Hoxton is affordable, has free wifi and its rooms are very tastefully decorated. But yeah, it's that day-stay perk that really cements it on this list.
Mood? Contemporary design.
Location perks? Super central, with Covent Garden and Soho a stone's throw away for late-night shenanigans.
Budget range? Very well priced for central London.