I have found the tri people in Cincinnati don't cross over a lot to the other races. If he is a tri guy you could shift over to Crits or TT and avoid him that way and still race.

If you want to ride with some other people you could check out Seven Hills - http://www.7hillsracing.com/ they seem like nice people.

Queen City Wheels also puts on the Ault Park Crits which are a lot of fun. http://www.qcw.org/index.php?option=...d=17&Itemid=22

Or there is the Cleves Time Trials - http://www.qcw.org/index.php?option=...&id=7&Itemid=9

The east side has a lot of rides and groups that head out into Indian Hill & beyond - check out Cinci cycle clubs site for locations.