I definitely CAN project, having worked for years without a sound system. But I think it's always best to bring one along. I've used the "house" wireless system in a retirement home and wasn't too pleased with it - they assured me I wouldn't need to bring my sound system but I wish I had. I agree that for a small room it's better without a sound system, but what about the guitar or your instrument. Sometimes the problem is that your voice can be heard all the way in the back of the room, but the guitar can't. I use the Fender Passport system and have been well pleased with it.