On tap, a McEwan's 70, which I found to be a deliciously smooth classic amber cream ale. The pub itself was quite nice, with high ceilings and ample seating.
According to Wikipedia, "McEwan's is the most popular ale brand in Scotland, where the brand enjoys a 22 per cent market share. However like most keg ale brands in the UK, sales are declining, by 63% since 2001."
Update: we visited again on December 1, 2011 as a family: