Never thought I'd find myself defending a lefty, but here we go...
Over the past few years, the centers in this area have begun to use flatter patterns for their house shots (3:1 or 4:1 or so). This means that there is some OB on both sides when the lanes are fresh, and thus the scores are usually rather subdued until the track starts to burn. Of course, this happens a lot faster on the right than on the left, so by the time second shift rolls around, the righties can get far enough inside to where the OB doesn't come into play, but the left is still tight. And with the equipment that is available today, the righties can continue to move further and further left without having to worry about recovery. As such, I'd have to say that these centers are not particularly favorable to lefthanders...at least when it comes to the short format of a league session. Things might be different in a long-format tournament, though.