Whether or not the company is registered, it should come within the definition of Shop and Establishment act. The relevant definitions are as under:-
"commercial establishment" means any premises wherein any trade, business or profession or any work in connection with, or incidental or ancillary thereto is carried on and includes a society registered under the Societies Registration Act, 1860 (21 of 1860), and charitable or other trust, whether registered or not, which carries on any business, trade or profession or work in connection with, or incidental or ancillary thereto, journalistic and printing establishments, contractors and auditors establishments, quarries and mines not governed by the Mines Act, 1952 (35 of 1952), educational or other institutions run for private gain, and premises in which business of banking, insurance, stocks and shares, brokerage or produce exchange is carried on, but does not include a shop or a factory registered under the Factories Act, 1948 (43 of 1948), or theatres, cinemas, restaurants, eating houses, residential hotels, clubs or other places of public amusements or entertainment;
"establishment" means a shop, a commercial establishment, residential hotel, restaurant, eating-house, theatre or other places of public amusement or entertainment to which this Act applies and includes such other establishment as Government may, by notification in the Official Gazette, declare to be an establishment for the purpose of this Act;
If yes, then proceeding under or applying the Shop and Establishment is the best bet in the facts and circumstances.