In order to swiftly get back into the PQ when finished, instead of waiting around, have one person leave the bonus stage (as long as 2 people including the leader remain in the bonus no-one else will be able to enter the PQ) to check whether there are any parties outside waiting. Hope you like this Maplestory guide.
If so, try to 'Rush'. This means everyone leaves the PQ, activates Nimble Feet if they have it and runs like mad back to the PQ start. The leader then clicks Lakelis again and re-enters your party for the PQ, hopefully without the other group trying to enter while your party is running through Kerning City. If there is no-one outside, you can be a bit less frantic with the Rush tactic, but try to get there quickly.
Important Note: If you get there within 10 seconds of leaving the last PQ, it will say there is a party already in there. There is not. Wait for a few seconds and try again, it should let you in. Any way you do this, you should always use a scout. We provide MapleStory Mesos for you.
There is a method to PQing called smuggling, which involves exploiting the game(Maplestory powerleveling) mechanics to take your coupons outside of the PQ and then re-entering to do the stages more quickly. We will not explain it, since we disapprove of such exploitation. If you want to smuggle, get someone else to tell you how. We will say however that it is not much faster than normal PQing, and there is the risk of missing when you leave the PQ, so it really isn't worth it.