Mostly alone on a daily basis but I get together with a group of women a couple a year plus I do a getaway retreat with my sewing buddy to a hotel suite once a year.
I try to get together with my sewing buddy about once every six weeks. My sewing room is set up for "double occupancy" as is hers. So we dont lug hardly anything but the project. I have two cutting areas, two ironing areas, two machine setups and doubles of almost all notions. God I sound like a piglet!
On our sewing buddy days we are usually working on a joint project. Like a couple weeks ago we wanted to learn a new technique so she came to my house and we each made a table runner. One time it was a quilt for charity. Once it was a sewing tote. Occasionally we do help each other when we are "stuck" on a project and are not "getting" it.
I know that I HATE lugging everything to a class or when we started doing this I would lug everything to my friend's house. It was more of a PITA than it was worth.