At my previous church, we had instituted a Praise & Worship team for the first time, and it was slowly received, because the congregation was full of majority 'seasoned' members, and so this was new to them. For a while, they wouldn't stand up. So after a while, because the deacons still open up with scripture and prayer, we would have the deacons tell the congregation to stand for praise n worship. Now when that first started, ppl would stand for the first song, then sit for the second song (we always only sang two songs...didn't wanna overdue it). After about 6 months though...and the congregation began to get use to the idea of praise and worship, they began to participate in it more.
The church I'm at now i really enjoy, because the whole congregation is into the P&W, and it really sets the tone for the rest of the service.