I'm by no means an expert on the WeGo, but I think there's a couple factors to consider here...if you're running the WeGo into the line in RCA jacks of the house mixer...you might be okay. A test run before the actual party, might be advisable.
If there's isn't a house mixer available and you plan to run the WeGo directly to the amplifiers...this probably won't perform very well because the WeGo "appears to me" to have RCA unbalanced outputs, and I would "suspect" they are -10 dBV consumer grade outputs (as opposed to +4dBu pro-line level outputs), which wouldn't be enough to "properly" drive the amplifiers...without some type of up conversion to pro-level balanced outputs. There a device available called an "Art Clean Box Pro" which takes consumer level RCA inputs and upscales them to pro line level XLR balanced outputs...it's worth taking a look at and see if it fits your needs. Good luck