- Bakeries, Provincetown
- Bank Supplies & Equipment, Provincetown
- Banks, Provincetown
- Barbers, Provincetown
- Barns, Provincetown
- Bars, Provincetown
- Bars & Grills, Provincetown
- Bathroom Remodeling, Provincetown - Bathroom Remodel & Planning Services
- Beach & Water Related Services, Provincetown
- Beads Decor, Provincetown
- Beauty Salons, Provincetown
- Bed & Breakfast, Provincetown
- Beer & Wine Stores, Provincetown
- Beverage Stores, Provincetown
- Bicycle Parts & Accessories, Provincetown
- Bicycle Rentals, Provincetown - Bike Rental
- Bicycle Repair & Service, Provincetown - Bike Repair Shops
- Bicycle Shops, Provincetown - Road, Hybrid, Folding, BMX, Electric & Mountain Bikes Stores & Dealers
- Bistros, Provincetown
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- Boat & Yacht Charters, Provincetown
- Boat Fishing Charters & Tours, Provincetown
- Boat Services, Provincetown
- Boat Storage , Provincetown - Equipment & Services
- Book Stores, Provincetown
- Books, Magazines & Newspapers Stores, Provincetown - Bookstores
- Boutiques & Boutique Items, Provincetown
- Builders & Contractors, Provincetown
- Builders & Contractors - More, Provincetown
- Builders Hardware Stores, Provincetown
- Building Construction Consultants, Provincetown - Construction Management & Consulting
- Building Design & Construction Consultants, Provincetown
- Building Materials, Provincetown - Wholesale, Manufacturers, Dealers & Suppliers
- Building Materials & Supplies, Provincetown
- Business & Professional Associations, Provincetown
- Business Legal Services, Provincetown
- Business Management Consultants, Provincetown
- Business Services, Provincetown
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