James Komack had two big hits on the air as 1977 began. Chico & The Man on NBC, and Welcome Back, Kotter on ABC. However, no matter how hard Komack tried, he couldn't add another series that stuck.
In 1976, he'd acquired a license to adapt Archie for television, but all that resulted was a 1 hour pilot that was burned off in the summer, and is not available on YouTube. In the spring of 1977, Komack sold a fresh series to ABC, hoping it might catch on. Unfortunately, his luck was continuing to run out.
Sugar Time was designed as a vehicle for former Playboy pinup-turned-actress-turned-singer Barbi Benton, not much more. It was about an aspiring girl group trying to get established. They weren't going to remind anyone of Josie & The Pussycats by any stretch, for example, but they did predate the revival of all-girl groups by a few years.
After the series ended, Benton went on to Nashville to try her hand as a country singer and joined the cast of Hee Haw. Darleen "Didi" Carr would make a few guest appearances here and there over the next several years, but I don't think she landed another series gig of any successful length. Some of you might be surprised to learn she has a sister who was also very successful around the same time, but mostly in cartoons. Said sister being Shannon Farnon, the voice of Wonder Woman on Super Friends from 1973-84.
To try to help the show, Komack recruited Charles Fleischer (Carvelli from Kotter) to play a recurring character, but only got 3 episodes out of Fleischer before the curtain dropped on Sugar Time.
Gilmore Box uploaded the open: