what would you do on your weekend back home? just do the same... ok, no car, but there are cabs, or in a worst case scenario, there are buses... just do your regular stuff.. if you have any hobby in your life, the weekend is the best time for it...
..GYM, crafting, painting, long (short) walk, reading books, cooking, inviting friends for the lunch/dinner, playing cards, designing your own web pages, moving the furniture in your house, fishing/going for the picnic with your friends..
..i don't know.. there are hundreds things that you can do.. i wish i could have more time on weekends...

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“You become responsible forever for what you have tamed”. Antoine de Saint-Exupéry