I've got a little Hiplok Z-Lock thing that is small enough to shove in the side of my handlebar pack, and although it's basically a heavy duty cable tie with a combination lock on it, it's enough just to make that extra couple of minutes of inconvenience to someone who would be otherwise be able to just walk off with the bike.
I wouldn't trust it if the bike was out of sight for more than a few minutes - but for locking up outside the coffee shop where I can still see it, it's better than nothing.
I've got a little Hiplok Z-Lock thing that is small enough to shove in the side of my handlebar pack, and although it's basically a heavy duty cable tie with a combination lock on it, it's enough just to make that extra couple of minutes of inconvenience to someone who would be otherwise be able to just walk off with the bike.
I wouldn't trust it if the bike was out of sight for more than a few minutes - but for locking up outside the coffee shop where I can still see it, it's better than nothing.