I'm hard pressed to think of one place that fits all your requirements of BYOB, 10+ people, Saturday night reservations, fun and close to Walnut Room. btw, if/when you do find one, please let us know, I'd be very interested ;) Most of the BYOBs I can think of are fairly small and not sure they take reservations, most of the ones I though of are already mentioned, but I would add Matyson (19th & near Chestnut). Now, non-BYOB's, I'm not sure if the following take reservations, but have okay food and a 'fun' atmosphere: - Nodding Head (On Sansom, between 16th & 15th), micro-brew with decent food. Should be pretty lively on Saturday nights, has a separate room that can hold 10+ easily - McGillians (near 13th & Drury) oldest pub in Philly, has a good selection of beers and standard pub food which isn't too bad. It has an upstairs (which you might be able to reserve a table). I imagine it would be kinda crowded on Saturday night and can be loud. Also, I think after 9pm is karaoke, downstairs. Good Luck