I use the big tables at our church to sandwich my quilts together. FYI I'm also employed there - so its extra easy for me.
But if you are a member - or know someone who is a member - you could contact the church office and ask to use their Fellowship Hall for an hour or so. Nothing leaves the building - it's usually well lit and comfortable. =) I just bring everything I need with me, and leave it just as I found it. =)
Good Luck!
Donna Mc