I have a tutorial on my blog about basting a quilt (using 505 spray) on my dining room (or any) table.
http://quiltersparadisecafe.blogspot...max-results=10
I hope that link works.
It works great. Even if you are not using basting spray, you can use this method. I've done it this way all my quilting life, and it is very reliable and much better than floor pinning. The church tables, library tables, or even saw horses with plywood on them is usable.
Good luck!