- Bakeries, Mechanicville
- Banks, Mechanicville
- Baptist Churches, Mechanicville
- Barbers, Mechanicville
- Bars, Mechanicville
- Bars & Grills, Mechanicville
- Baseball Cards & Sports Memorabilia, Mechanicville
- Battery, Mechanicville - Retail Batteries Stores
- Battery Storage, Mechanicville
- Beauty Salons, Mechanicville
- Bedroom Furniture Stores, Mechanicville - Master & Kids Bedroom Furniture Sets & Beds
- Beer & Ale - Wholesale, Mechanicville
- Beer & Wine Stores, Mechanicville
- Beer Taverns, Mechanicville
- Beverage Stores, Mechanicville
- Beverages, Mechanicville
- Boutiques & Boutique Items, Mechanicville
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- Bowling Centers, Mechanicville
- Breakfast Restaurants, Mechanicville
- Bricks, Blocks & Stone Products, Mechanicville - Companies, Wholesale, Manufacturers & Suppliers
- Brooms & Brushes Manufacturers, Mechanicville
- Builders & Contractors, Mechanicville
- Builders & Contractors - More, Mechanicville
- Building & Property Maintenance & Services, Mechanicville
- Building Cleaning - Exterior, Mechanicville - Cleaning Service
- Building Construction Consultants, Mechanicville - Construction Management & Consulting
- Building Materials, Mechanicville - Wholesale, Manufacturers, Dealers & Suppliers
- Building Materials & Supplies, Mechanicville
- Burglar Alarm Systems, Mechanicville
- Business Brokers, Mechanicville
- Business Insurance, Mechanicville
- Business Legal Services, Mechanicville
- Business Management Consultants, Mechanicville
- Business Services, Mechanicville
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