What about evening rides during the week? There's still daylight. Short 1-1.5 hr rides are a good time to work on interval training. Where do the other cyclists in your area go after work? Are there any weekday rides? There must be something else you can make it to at least once a week. That will help. Then there's the early morning training ride, but I like my sleep too much for that , but there may be some small groups who train then. You don't have to train with others before or after work, but if you find some buddies, then you can get information on where it's safe to ride during the commuting hours.