Stan's in Monrovia has a conversational-paced Sunday morning ride. Call 'em to confirm start time is 8:00 am from Stan's: (626) 357-0020.

I live right near the Bowl, and I ride around there some on off days, and I always see other cyclists, especially in the summertime evenings, and all day on weekends, at night, during events, etc. It's poseur heaven, so be sure and wear your kit. And for God's sake, don't draft anyone unannounced.