[imported_The Vibesman]

This is fine except for UTG+1. He probably knows what you know and wants to come along for the ride. Better if just maniac had come in.
I'd usually try to isolate a maniac w/ a decent A or K (not as good as needs to normally be; A8, K8 is fine w/ me for this) or any pocket pair, something that can win unimproved against another unimproved hand. Depending on the player, my position and my mood, I can be looser sometimes.

Against very loose players before the flop, I think you need to stick to your better hands. You can't loosen up with raising, just calling. When everyone is loose, they will give you odds to call with your speculative hands; you can play 22 for set value and look to hit suited connectors because there are enough people in the hand to pay off big if you do hit. But raising's different. If you raise at a very loose table, you will likely get more callers, so you need premium hands that are more likely to hold up. I'm not sure I'm expressing this right...