It was also reintroduced to The Sims 3 via Patch 22 and the Generations expansion pack, and was included in The Sims 4 base game.
One Sim can ask another to go Downtown, either in person or over the telephone.
The key is to do fun things together and avoid dating disasters.
Dating is a quick way to build up romantic relationship with another Sim.
However, if things go really well, the "Invite Home" interaction will appear.