Need help with joining a room in photon?

I’ve been working on a multiplayer bingo game using photon networking for multiplayer connectivity.
The lobby connectivity and random room joining are working fine. But I wanted to create custom rooms for game modes.

I’ve provided a image file for your reference.

Here after joining a lobby there are different modes in which user can enter. I’ve already written code for creating and joining room but i don’t know how to make custom rooms.

I just wanted to connect players who have enters particular game modes together, i.e 5 player want to play fast 5 game mode only they will be inside that room and so on.
Please can somebody help me out with this. Thanks in advance.

@kaustubh_unity You can add a custom property to your room which will denote the game type, and for joining, use joinrandomroom() with same custom properties to filter out the rooms.