Glasgow Subway is £1 single. And since it's a circle, you can get a lot for
your pound. You can go round and round and round and round and round and
round and round all day (if you're sufficiently sad).

Also, you never have to miss your stop, just wait for it to come round again
(I did steal this idea from someone else).

--
"We are now approaching Paisley Gilmour Street"