Honestly an amazing card. There are obvious uses like finding the victory point enemies for the xp or just drawing a bunch of cards but I want to cover some other very useful use cases:

•Fishing out difficult enemies just before an act/agenda shuffles the discard back in to avoid drawing them again.

•Certain enemies want to be evaded not fought but this can be awkward if they spawn at a crossroads or location you'll have to backtrack on, by going to a dead-end and playing this you can ensure they stay out of the way.

•Getting the victory point enemy out of the deck when there is downtime so you don't have to deal with them later AND they spawn exhausted giving your team time to deal damage risk free of oppertunity attacks, relatilate or regular attacks.

•Enabling otherwise inconsistent clue getting cards like Scene of the Crime or Evidence! (notably able to find big enemies for Evidence! (2)) for when you really need the clues. Conversely being able to find high stated enemies for a card like Power Word early can allow you to get a lot of value or high health enemies for "Let God sort them out...".

•Certain enemies may have prey traits which are problematic for your team such as preying on your low or teammates to target their weak points, by drawing them yourself early you avoid these issues later for them (especially true for enemies which do things when they engage someone such as unavoidable damage).

A lot of these are minor use cases which aren't always useful, but considering you get all of this on a 0 cost draw card is amazing utility if you know what you're doing and long term will redefine how enemy management rogues go about their jobs and is a massive boon for guardians who get access to this like Zoey Samaras, Leo Anderson or Marion Tavares. Similar cards like Kicking the Hornet's Nest or On the Hunt may perform some of these jobs but "Where's the party?" does all of them and does it best I'd say.

Another fantastic card for rogues!

• Parley Action!
• You search the entire deck, not just the top 9 cards like On the Hunt or Kicking the Hornet's Nest. You can also search the discard pile which is something even On the Hunt doesn't do.
• It spawns exhausted, so you don't have to deal with it immediately. Rogues have lots of tricks for exhausted enemies.
• Drawing cards is slightly less useful than clues & resources, but getting 2-3 cards for builds that want to fight monaters is win-win.
• It doesn't say you shuffle the encounter afterwards, but I assume that's just an oversight & should be included.

Top Investigators:

• Rita Young (Trick)
• "Ashcan" Pete (Improvised)
• Marion Tavares (Improvised)
• Alessandra Zorzi (Parley)
• Kymani Jones (Spawns Exhausted)
• Tony Morgan (Combat Rogue)
• Michael McGlen (Combat Rogue)

"Casual" way of use I found that won't require knowledge of exactly what's in the encounter deck is when you are already engaging, and you want to use 1 of your 3 actions to get 2~3 more cards without taking any AoO in order to get some event or skill card solutions. Unless encounter deck has 0 enemy, I think it is likely you can pick a 1/1 enemy so you can draw 2 cards to help with the current, more difficult fight, then deal with that thing the next round. You can also look at discard pile too.

An example of in-box combos, cards like Robert Castaigne (4) require materials on hand to go ham with his and "Where's the party?" draws might be just the right thing. If you are with Dakota Garofalo instead, maybe you can get her stat boosts on along with using the draws. Drawing into Bum's Rush or Elusive isn't bad either if you are looking for a way out in the first place, because either you or the enemy is then displaced to balance out the fact that you just increased amount enemy on board.

so if I take this with Mandy Thompson I can search encounter deck for 2 non elite enemies and spawn them exhausted then draw cards equal to those enemies' combined damage and horror values? question is... I imagine this is on avarge 5 card draw but killing them will be a lot of hassle?