Gasoholics Anonymous

I recently took a trip to Chicago, and as discussed in recent blog posts I brought a bicycle with me on the airplane. On the trip I stayed in a hotel 2.3 miles from the event I was attending, and wanted a way to travel in-between without having to rent a car. While I could have walked between the hotels, that would have meant 1 1/2 hrs or more of walking each day. Since there wasn't convenient mass transit, what could I do?