Nightclubs in GTA Online are businesses included in the game as a part of the After Hours update. Any of the ten clubs can be purchased at the Maze Bank Foreclosures website.
Shop robberies in GTA Online are not much different from them in the singleplayer.
To complete this daily objective, go to any of 20 stores marked on the map with the food basket icon. Point a gun at the shop clerk and wait until he throws you a bag with money. To make the store clerk fill the bag with cash faster, you can shoot the goods or shout through your headset.
You can also knock down the shop clerk or kill him and then take the money from the cash register without his assistance.
This daily objective completes when you take the money. Losing the cops is not necessary to complete the objective.