Kate asked if she could have a few friends over for a back to school tea party/white elephant. I currently have 25 teen girls in my backyard sipping icy drinks (it is in the 90s today) and munching on cookies.
I do so many family birthday parties for big crowds (our usual size is about 25-30 - big Italian family) that over the years I have developed a routine that I follow. This is what I do when I don't have to cram everyone in my house and the weather is decent.
I use my existing wooden picnic table and pull out a couple of folding tables that I cover with table cloths. I usually use vintage cloth floral ones, but this time I did not feel like washing them all after the party..so I resorted to vinyl.

This is the first year I used this vintage find. It is vinyl and I love, love it!

Even the woman on the packaging it came with marvels at its beauty!
I pull out my cute colorful folding chairs from the attic. The hot pink chairs are an IKEA item and the green are an estate sale find.
I tuck a table for drinks back under the trees.
Drinks go in a bucket with ice next to the drink table (this shot is post party). Ice water in the big green container with spigot.
I use a vintage ironing board for serving in a narrow space. This party it held the cookie bar (not home made...I was lazy and the temps are too hot). Drink table is beyond the cookie bar.
I also have a huge collection of vintage glass dishes for parties. These are the variety that were intended for snacks and not full meals. Great for a cookie exchange or appetizers. They come in a variety of sizes and shapes. I have about 40 of them. I am crazy.

I also got out my vintage punch cups for the girls to use.
I have a stash of silverware that is specifically for parties. I did not use it today, but it is great to have on hand.
Most of my serving platters and such are vintage. I got a great stash of plastic serving dishes a few years ago that resemble hobnail or pressed glass and are in awesome colors.
I always have fresh flowers. Today I used vintage milk bottles and glass jars to hold the blooms.
Sticking to my tried and true methods and having an assortment of serving pieces on hands makes throwing a party fairly easy. I stick to the same colors - green, pink, blues and yellows as I collect,so everything is mix and match . I do throw orange in occasionally too.
I can hear Kate and her friends laughing in the backyard...the party sounds like a success!