It's very last minute but I just found out about it myself. Incredibrew in Nashua is holding a Scottish Highlander Brewfest this Thursday.

Scottish Highlander Brewfest
May 7th at 6 PM
$50 for 2 variety cases
(bottles not included)
Join our clan as we brew time-honored beers from the highlands of Scotland. Scotch Ale, 60 Shillings Scotch Ale, Beam me up Scottish and, Nate's newest creation, a traditional Heather Ale, will all be featured. Return in 2 weeks for bottling. Bring your clean bottles and all the kilt jokes you can share.
Not exactly a kilt night but for lack of a more specific venue I decided this would be the best place for it.