One business that can never fail is Food business.
Either your friend can go for a Fast food corner including Chaat, Tikki, Dosa, Burger, Gol gappe or some range of foods. Home delivery will be an added advantage you can give.
Depending upon the budget your friend can make a choice.
Some of the place can be utilized for Ladies stuff like handbags, jewellery, cosmetics.
One exclusive idea I can share here - if there are number of boutiques around, Instead of keeping so much, your friend can start a simple shop of designer laces, buttons, Clothes accessories.
It sounds wierd but I am placed in Chandigarh and here there is one shop of this kind and the response is huge and huge coz nobody thinks to start such small business which infact is very earning.
Moreover, it doesnt need much investment but you need to keep the best. The kind of place you have mentioned would be an added advantage. You can expand the business once you are established.
Hope this will help
Vineet