Attempted to buy coffee and cake here in two separate cafes and failed. I can't think of the name of either of them but one was in the boathouse by the Abbey. Perhaps the waiters are just too fed up of the constant custom brought by visitors to care, but some places in Scotland would give their eye teeth for the kind of business generated here. My advice to tourists is share your cash with the smaller, out of the way places with warm friendly folk and gorgeous produce and baking. There are plenty of other canal locks around.