This site is great for helping to find and book a workspace. They not only list coworking options but also hotel rooms for short periods of time.

Great resource for finding private spaces to work at. 

Great tool for finding and booking meeting and coworking spaces. 

Find meeting rooms, boardrooms and office spaces for rent by the month, day or hour.

Flexible workspace for short or long-term. Includes co-working and virtual office options.

The world's largest database of crowdsourced local workspaces.