I'm not sure where your office is, i.e., whether it's part of a bigger commerical area, but you might see what other facilities are nearby. I work in the downtown Indy, and between other office buildings that have gyms and two nearby YMCA branches, there are places to shower and/or workout if I was need or want of such facilities. As it is, there is a gym and showers in my building. I typically don't shower when I work out; I just wipe down with a washcloth or baby wipes. I tend to do resistance work at lunch and don't get nearly as sweaty as I do when I run or ride though.