Here are some tips for visiting Dunkin', located at 7421 Sudley Rd, Manassas, Virginia, 20109:

1. Try their signature donuts: Dunkin' is known for their wide variety of delicious donuts. From classic flavors like glazed and chocolate to creative options like Boston cream and strawberry frosted, there's something for everyone.

2. Grab a cup of coffee: Dunkin' is famous for its coffee offerings. Whether you prefer a plain cup of joe or want to explore their specialty drinks like lattes, cappuccinos, or iced coffees, they have you covered. Don't forget to customize your drink by choosing your preferred milk, sweeteners, and flavors.

3. Sample their breakfast sandwiches: Dunkin' offers a range of breakfast sandwiches to satisfy your morning hunger. From classic combinations like bacon, egg, and cheese on a croissant to healthier alternatives with turkey sausage and egg whites, you'll find a tasty and convenient option to start your day.

4. Take advantage of the drive-thru: If you're in a hurry or prefer the convenience of staying in your car, Dunkin' has a drive-thru service available. This makes it quick and easy to pick up your favorite items without having to go inside.

5. Sign up for their rewards program: Dunkin' offers a rewards program where you can earn points for purchases and get exclusive discounts and freebies. Joining the DD Perks program can help you save money and enjoy additional perks while enjoying your favorite treats.

Remember to check their hours of operation and any specific guidelines or regulations they may have in place, as they may vary depending on location and current circumstances.