Tsim Sha Tsui's esprit is located in China Harbour City (that is, a place where you can leave Hong Kong by boat), next to Harbour City.
As for the Starbucks you mentioned, there are many in Tsim Sha Tsui. I don't know which one you are talking about. I guess you mean the one under the Harbour City or the one on the first floor of China Harbour City. Attached is a map for your reference.
Tsim Sha Tsui?
iSQUARE
63 Nathan Road? iSQUARE? LB2 shop
tel:? 2947? 9553
Kowloon Hotel
No.G1 and G2, Kowloon Hotel Shopping Mall, No.19-21 Nathan Road
tel:? 2366? 29
Cultural Centre Performing Arts Building
G/F, Hong Kong Cultural Centre Performing Arts Building
tel:? 2311? 3245
Harbour City
G111, Gangwei Shopping Mall, Harbour City
tel:? 2314? 791
Harbour City
Shop 3327, 3rd floor, Harbour City
tel:? 2175? 4115
Harbour City
No.45-6, 4th Floor, ocean centre, Harbour City
tel:? 2314? 929
star house basement
Shop B5, star house basement, Salisbury Road
tel:? 2735? 1183
LCX
LCX, 3rd floor, ocean terminal, Tsim Sha Tsui Harbour City? -? X? +berth
tel:? 273? 7581
New Sun Plaza
B, basement 1, New Sun Plaza, No.28 Canton Road, Tsim Sha Tsui? 6A? No.
tel? :? 2736? 7376
China Port City
17A, Floor 1, China Port City, No.33 Canton Road, Tsim Sha Tsui? Shop
tel? :? 2317? 125
Austin Road
G/F, No.12 Austin Road, Tsim Sha Tsui?
tel? :? 2375? 51
Northford terrace
No.3, 1st floor, Northford terrace, No.1 kimberley road
tel:? 3167? 798
Hong Kong Crystal Center
Shop 6 and 61, G/F, Hong Kong Crystal Center, 1 Granville Road, Tsim Sha Tsui
tel? :? 2732? 2619
Empire Center
Shop G43-45, Ground Floor, Empire Center, No.68 Modao Road, Tsim Sha Tsui
tel:? 2723? 71
Guanhua Center
Shop G5-6, Ground Floor, Guanhua Center, No.61 Modai Road, Tsim Sha Tsui
tel? :? 2732? 2972
Avenue of Stars
Avenue of Stars in Tsim Sha Tsui Waterfront Garden, Kowloon Bay
tel:? 2722? 5743