Chances are you are within 30 minutes of a big city. Grab your friends, hop in the car and go cruise around a city late at night and just observe the nightlife.
Pick a night, tell everyone to bring a dish, and host a potluck. There is nothing more fun than hanging with your friends and eating some food.
See where you can go hiking nearby and meet your friends there early one morning. If you're looking for a good spot, simply search for “Hiking trails near me”.
Find some old 500 or 1,000 piece puzzles, grab a cheap bottle of wine, and hang with your friends doing a puzzle and chatting one evening!