About 10% of my coworkers are also interested in bicycling in one way or another. I am part of a group of three who regularly go out and do hard and hilly 1 hour rides at lunch. I'm the oldest in the group by far so it's a bit of a struggle to keep up, though my attitude is that keeping up with the young fellers keeps me young too. Luckily, we have a shower in the building adjacent to ours.