If you're looking to start a party on Roblox, there are a few things you'll need to do. First, you'll need to create a game or join one that's already in progress. Once you're in the game, press the Menu button located in the bottom-right corner of the screen. From there, select the Party option. This will open up a menu where you can invite friends, set up party settings, and more. To invite someone to your party, simply click on their name and hit the Invite button. Once they accept your invitation, they'll be added to your party chat and will be able to see all of the other members that are currently in the party. You can also use this menu to leave or end your party at any time.