We did an outdoor get together at Bear Mountain Resort. May not be exactly what you are looking for but it worked great for us. Had food brought out by the hotel; bar set up outside, grassy area for some basic games. Had a tour of the wine cellar just beforehand. Beautiful view of the golf course; weather was great. May want to give them a call to see if it is something you'd be interested in. Was a nice evening all together before the wedding the next day at Hatley Castle.
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