If you're planning any type of upcoming event that will include music or public speaking, you'll want to rent some speakers. This will ensure everyone in the room can enjoy the music or clearly hear a speaker, presentation, and so on. Don't assume that a speaker on a stage or handheld microphone will be enough for your crowd; note a few factors to keep in mind so you can decide the type and the number of speakers to rent.
If your event will feature presentations or lectures, chances are everyone will be facing the stage at all times. However, for a more social event, you might have round tables, so that everyone winds up facing different directions. Someone who is not facing speakers may then miss out on hearing and enjoying music or announcements. If your attendees will be facing any direction other than the front of the room, you want to provide speakers that surround them so they can clearly hear everything coming through those speakers.
Dancing and lounging
For social events that include dancing as well as socializing, you may want to keep speakers away from one area of the room, and then set up lounge chairs as well as tables in that space. This can allow guests to hear the music without it being so loud that they cannot chat, while those who want to dance will be able to enjoy it properly.
Note if there are any obstacles in the room that might easily absorb sound coming from a stage or elsewhere. For example, a classroom might have a folding fabric divider that runs across the middle of the room. Even if the divider is folded up and sitting against a wall, it can still absorb sound. Add speakers behind it or on the other side of the room so everyone can hear clearly. Thick curtains in the room can also absorb sound, so invest in extra speakers to compensate.
When choosing speakers for music and dancing, you may want to get a bass booster, as a thumping bass often gets people in the mood to dance. However, don't assume that you can go without added bass for a lecture or presentation. Speakers that are without proper bass can make a person's voice sound tinny and too high-pitched, and certain words may be difficult to hear clearly. The larger the room, the more bass you'll want so that high-pitched sounds and voices don't get lost in that open area.