Party pix also involve training
“Guys, we know we were not born here, (Our birth place was a big sheep farm in the middle of Scotland.), but we sure can party with the best of US-born dogs.
“How about an invitation to the July 4th doings? We can show your guests lots of tricks and expressions.” [From the left: Miste, Mither, Moss.]
While you consider their request, how about putting your dog(s) on a sit/stay and decorating them or the scene with some July 4th colors?
The exercise will help ‘proof’ the dog’s sit/stay command and when he/she/they do — you’ll know they were paying attention to you, doing what you want them to and remaining on task. Those are the three essentials of basic dog training. You will have accomplished a lot and had some fun in the process.
Dog training need not all be heel, sit, down, stay commands. Have fun with your dogs. Engage their brains to encourage them to figure out what you want them to do. Name the activity — here a ‘wave’ from Miste. 
Her wearing a costume is also part of training. Put it on and expect the dog to leave it alone and pay attention to you and remain on the task you’ve given the dog. Training can and should be fun for both you and your dog. Enjoy.
Enjoy. Happy 4th.