For group rides, where it's more likely that I'll have an extended stop for food/drinks afterwards, I'll bring my Otto Lock along (and usually keep the bikes within line-of-sight). For solo rides, I'm unlikely to stop for more than a convenience store snack, in which case I'll just lean it against a wall outside, preferably with an obstacle of some sort in front of it. If I felt that I needed to bring it inside, I wouldn't hesitate to, but that's pretty rare.