My post is a little late here, as the guys already played Cleveland earlier this week - But for future reference:
There's a nice Irish pub/restaurant in Lakewood Ohio (a western suburb of Cleveland) called Sullivan's who not only have a great selection of brews, delicious fish & chips + boxty & shepherd's pie - but they play lots of Great Big Sea music!  Highly recommended. They also have a cheddar cheese dip w/boxty wedges that is killer!

http://www.sullivansirishpub.net