Ladies, ladies, ladies...
A quick look with an infrared camera will show a "typical" (sorry for the unqualified generalisation) gas patio heater heating Very efficiently - so long as you are in an expanding amorphous cone suspended above the patio heater. Below, you get warm, but not in any way efficiently.
I know there is this Luddites versus Libertarians argument going on, with El Reg fighting the noble fight for our right to convenient comfort at any expense, but you do have to say enough waste is, well, enough... somewhere.. somehow.. and unfortunately all legislators can do is legislate, so they legislate and thus, the law.
Whether that is effective against the average man's determination to exercise his god given right to sit comfortably in the beer garden of his local boozer wearing n'owt but his bloomers while glaciers advance and polar bears flee the bitter arctic winds... well I doubt it..
I know this sounds mean spirited and, well, Radiohead'ish, but grow some balls people. Yes, you too, ladies. Put on your thick socks, pull on a cardie, wear a beanie and quaff your ale. Earne your right to laugh mockingly at the ladymen huddled by the hearth in the main bar - cringing meekly from the elements that you, so imperiously, embrace as kin. The wind, the rain and the snow that carved your visage from the British bedrock leaves lesser men hiding with the womenfolk and singing raucous ballads by the player piano in a vain attempt to conceal their shame. They are chalk to your granite. Clay to your rough-hewn bluestone.
Just dont go around expecting someone to furnish a balmy summers day everywhere you decide to plant your arse and get off your face. That is just wasteful and stupid...
...Just because you were too gutless to move to Australia when your friends did. Maybe a few more joules will burn away the stinging memory of their smug postcards..
Crank up the burner, barkeep!