Look at churches, hotels, and lounge piano gigs (there is a current lounge piano thread you may be interested in reading) for starters.
For a church, you may offer to play a few services or donate some money to the leaky roof fund as a trade for use of their facilities. You never know, it may turn into a paying position if they like you.
Hotels or banquet halls may need a lobby or event pianist. Volunteer to play for guests. They might even pay you.
One of the bars in my university had a piano, and it was frequently used as an "open piano" you could hear anything from jazz standards, to Rach concertos, to avant garde any time of the day or night.