Depends....

At campfire circles at reenactments and the like, I traditionally like to wind up with "Amazing Grace". Most of us seem to know it, and it seems to invoke a certain blessing of peace as the fires burns low and we wend our way to the tents.

Now on the other hand if there is a sufficiency of ardent spirits going around and the young buckaroos have plenty of steam left, a Hymn is NOT what they want to hear, and chances are that the surrounding woods will be ringing to heroic verses of "Beer and Tobacco" and "One Ball Rielly" long after I have given up to exhaustion and crawled into my dog-tent for a couple hours of blissful coma before "Drummers' Call" is beat (@ about 0530)for us Musicians to take the field for the "Reville" ceremony.

I have been learning "Parting Glass" over the Winter, thanks largely to this Mudcat, and will probably be using that a lot more in the future - a'capella or on tin whistle or open-holed low-"G" walnut flute I made. A little less "spiritual", perhaps, but I play to and with all sorts of crowds, and it seems most approprite to some.

Another in the nautical vein which might be nice is "Fiddler's Green" - but I'd be hesitant to use it in a paying gig as it is of recent composition and not "public domain" as the preceeding two.

"So Long, It's Been Good t' Know Ya"... "Happy Trails" (Roy Rodgers)

Whoever that "Artist" was, if his performance inspired the audience to such gastric distress as you imply, one could only describe his music as "emetic". Of course, in some venues (England comes to mind), that could become immensely popular, I suppose. How should one end such a concert? Quickly, I would hope!