We must do an adult game night and do some of these! this site has really hilarious game ideas for adults and kids. they can be used for birthdays, reunions, Christmas parties, or just a fun game night.
Make a backyard bowling alley. Add food coloring to clear plastic bottles of water. Use party streamers as lane margins. Add glow sticks for night bowling. (These would make great outdoor table nightlights also with the glowsticks, gonna try it!