The 2 times I'd recommend are 3:30-4:00 and right after they open, shortly after 11:00. That's both from me and the CM I asked there. One night I stopped in after Illuminations-mistake! The line was out the door. So I asked the CM there when was a less crowded time, and after she stopped laughing (said "It does seem to be always crowded, doesn't it?"), suggested that when she comes to work about 3:30 seems less busy, and probably right after they open. When I went back the next afternoon at 4:00, only about half the booths were full, and I got waited on immediately. The CMs said that it was unusually quiet that day (reason unknown). And this was Thanksgiving week-not a quiet time for WDW. But definitely don't go after Illuminations-the CMs said that people RUN to Beaches and Cream at that time.