Problem is everywhere else is in Selkirk and after wondering around by Google Street view there does not appear to be anywhere with outdoor seating that does food and has somewhere safe...ish to pile a load of bikes.
There is a snack bar around the corner from the Station hotel bar but that looks like a old mans spit a sawdust pub and does not seem to do food from my researches. The pub is on a culdesac though with a couple of tables outside and the snack bar may have good scran for scruffy mtb'rs, it'll need studied :?
Otherwise hanging about outside Gregs may be the answer if Selkirks got a Gregs.