If you don't mind my asking, how much does something like this cost? This sounds great!
Welcome Party- $3,613 total
This included:
-41 Chip and Dale Rehearsal Dinner Buffets @ $44pp = $1804
-4 Childrens Chip and Dale Rehearsal Dinner Buffets @ $22pp = $88
-1 Gluten Free Childs Meal @ $22pp - $22
-Hosted Beer and Wine Bar @ $7 each - (65 served drinks) = $455
-Soft Drinks, Assorted @ $3.75 each (49 served) = $183.75
-Bottled Water @ $3.75 each (14 served) = $52.50
Bar- $455, Catering Not Taxed- $52.50, Catering total- $2,097.75, Service Charge- $521.05, Sales tax- $199.79 = TOTAL $3326.09
-Plus minimal Floral decorations @ $270 plus $17.55 tax for another $287.55
We decided that with the location, we didn't need much decoration wise, and no entertainment for 2 hours because our guests would much rather mingle and hang out together. Boy were we right. We had people lingering well after in the room just talking and they ended up moving to one of the bars to continue. Mind you, these were people who had never met!

Exactly what we wanted from the party.
The decorations we did have were small centerpieces for the tables that had an electric candle in the middle for "when it started getting dark." (Our party was from 4-6 in August, it doesn't get dark until later but the florist insisted we should have them... not a big deal since they ended up looking nice turned on inside.) I would suggest that if you do something like this that you ask what kind of lighting is provide if the event goes into dusk/nighttime since it gets darker earlier in October.
But I REALLY enjoyed this as it gave everyone a chance to meet in a much more relaxed setting and have a great time.