Most of the aforementioned do the trick for me.

Some personal favourites are (in no particular order):-

HARLEM HAMFATS (any compilation)
RONNIE DAWSON "MONKEY BEAT" - only if you like rockabilly
CHARLES MINGUS "TIJUANA MOODS" and most of his gospelly soul-jazz.
GARY STEWART "LIVE AT BILLIE BOB'S TEXAS" - must be me, but hard rocking, hard-drinking, cheating honky-tonk songs make me feel good...
CHUCK BERRY (any compilation of his best songs)
"I'M SORRY I HAVEN'T A CLUE" recordings
"ROUND THE HORNE" recordings
LAZY ADE MONSBOURGH AND HIS LATE HOUR BOYS "WILD LIFE" - Oh what joy from this great Australian trad-jazz musicias and his mates.
JULIO IGLESIAS "DIVORCIO" - OK not a great title for a feelgood album, but dig "El Bacalao" - the joy of eating a good fish meal.
SLIM GAILLARD "OPERA IN VOUT" (or other compilations) Title track,
"Chicken Rhythm", "Laughin' in Rhythm" etc
BILLIE HOLIDAY - any compliation of her COLUMBIA sides, with lovely musicians. Not the later stuff, which I love, but it ain't good-time music....
NOTTY's JUG SERENADERS "UNITED OUR THING WILL STAND" or "WALTZIN' THE BLUES AND BALLIN' THE JUG" -   eccentric Swiss-German jug band.
SPIKE JONES
ABDULLAH IBRAHIM alias DOLLAR BRAND - any album containing "Water from an Ancient Well" and/or "Black & Brown Cherries" (the later gets me dancing and playing "air-saxophone")
CHRIS McGREGOR'S BROTHERHOOD OF BREATH - more great South African "township jazz"
"UNDER MILK WOOD" - original BBC radio broadcast with Richard Burton and other fine actors.

Sorry no folk music as such. It's all a matter of taste, but all the above make me feel good and even dance (when no-one's around).
I better shut up or I will think of more...........