Admission: Free to Members, £5 to guests (refundable if they join up on the night)

To mark the forthcoming 150th anniversary of the publication of Jules Verne's 20,000 Leagues Under the Sea, this party will be a Victorian sci-fi Christmas adventure. So the dress code is broadly Victorian, possibly Steampunk, arguably including all the continents of the Earth (or other planets) where adventures might take place and the natives subjugated.

Games will include steering a balloon around the world in 80 seconds before landing it on the Reform Club, guiding a pterodactyl to seize hapless adventurers from the plateau of a subterranean lost world, or designing your own enticing cover artwork for an imaginary Jules Verne re-release.

Raffle prizes will of course include works by Monsieur Verne, plus science kits, Victorian maps, gadgetry, a squid and lashings of cogs and gears. Doubtless some brass goggles.