My husband's 40th birthday is coming up and I'd like to have a party for around 40 people. Something laid back, fun, and casual. Cost is definitely a consideration, and we are a group of big drinkers, so I am thinking BYO is the way to go. Any suggestions for a fun lively spot with a private room or area that could accomodate around 40 people on a Saturday night? We live in Montco, but our friends are scattered, so it can be anywhere in Philly or the burbs.