From the facts in query as well as post 1, it appears that the said bakery and sweet stall is serving tea/ coffee.
Pls refer to following proviso to section 10:
Provided further that a person who opts to pay tax under clause (a) or clause (b) or clause (c) may supply services (other than those referred to in clause (b) of paragraph 6 of Schedule II), of value not exceeding ten per cent. of turnover in a State or Union territory in the preceding financial year or five lakh rupees, whichever is higher.
Clause (b) of Para 6 of Schedule II reads as below:
6. Composite supply
The following composite supplies shall be treated as a supply of services, namely:-
(a) works contract as defined in clause (119) of section 2; and
(b) supply, by way of or as part of any service or in any other manner whatsoever, of goods, being food or any other article for human consumption or any drink (other than alcoholic liquor for human consumption), where such supply or service is for cash, deferred payment or other valuable consideration.
In my opinion, serving tea/ coffee gets covered under the above entry and hence, as per the proviso to section 10 the bakery will not be eligible under sub-section (1).