How about sinking some tall posts into the ground in a semi-circle and
growing climbers up them so that you form a sort of bower. If you wanted
to, you could then put laths or trellising across from post to post and
create a pergola at the same time. If you want to have a table and chairs
there, I'd have paving rather than gravel and make sure the paving is flat
and firmly 'set'. Knock the corner off the paving slabs here and there
and
plant low-growing but nicely smelling herbs, like Thyme so that when you
walk there and brush against them, they release their scent.

sounds intersting :-)