Here's a short list:
Kalligraphia
Jolly Roger
Harlow Solid
Bakery Script
Groovin'

...or maybe House Idustries package Street Van?

And here's a list from Identifont that you'll probably like...

Thanks for your help - I think "Groovin'" will be a good base to start from...

I'd love to see what you come up with, Liz.

Groovin is noticeably "1960s".
Seymour Chwast's Artone logo (1964) is iconic for this "fat bottom" style.
The font is probably named after the Young Rascals song (1967).
However, although bell-bottom trousers/pants were invented in the 60s, their heyday was the early 70s.

"Groovin" was a very 60s term that came out of the Haight hippie vernacular. The lettering was best seen in work known as Family Dog
http://www.wolfgangsvault.com/se/family-dog-series/FD.html

The early 70s was actually what most people remember as 60s look. The Beatles Rubber Soul album shows a glimpse of that fat bottom look. There was a great Art Nouveau influence as well.

ChrisL

"Jump for Joy" lyrics, Duke Ellington, 1940;

Fare thee well land of cotton.
Cotton lisle is out of style,
Honey chile
Jump for Joy
Don't you grieve little Eve
All the hounds I do believe
have been killed
Ain't 'cha thrilled?
Jump for Joy
Have you seen pastures groovy?
Green pastures was just a technicolor movie
When you stomp up to heaven and you meet old Saint Pete
Tell that boy

Candice

http://www.myfonts.com/fonts/linotype/candice-lt/

Nick,
That sure predates the Young Rascals :-)

ChrisL

and in my opinion Nick its much groovier

OK, Dan, You're Feelin' Groovy, da da, da,da,da,da,da...

ChrisL

http://www.pbase.com/ziggers/image/29402593