If you don't want anything too fancy or to feed the 5000 then you could opt for cupcakes! They're a good gesture to hand to your guests at the end of your event and you're not really left like feeling you have a lot of cake left to get rid of.
Cupcakes are popular for all occasions. They can go well alongside a Birthday/Wedding/Christening and Baby shower cake or just simply have them on their own.
Basic buttercream - start from £1.50 each.
fondant topped cupcakes - start from £2.50 each.