Since I changed job and do not travel as frequent anymore, my Enrich Gold had been downgraded. But the last I remember (that was as far back as 2011), I could no longer bring in a guest in a third party lounge. They would allow if I travelled on business and use that ticket and enrich gold to bring in a guest. I imagine the benefits can only get lesser now...
In any case, Enrich has disappointed my on a few occassions - top of the list is that surcharge and taxes are exorbitant when i redeemed for tickets, compared to commercial tickets. I paid so much more especially when that route just recently went on sale! urgh!