Congrats on the upcoming arrival! Since you're near Tiong Bahru, it's worth knowing there's actually a dedicated event space in that area called Little House of Dreams, I heard it's quite whimsical and suited for baby showers, so might be worth calling them directly to check availability. The condo function room route is great if you can get access to one since it's free and usually spacious enough for 25-30 pax, but the catch is you really need a resident to book it for you, so hopefully someone in your network can step up. If neither works out, a private hire venue gives you more control over timing and setup, though it does come with a cost, so it really depends on how quickly you need to confirm and what your budget looks like.