I don't HAVE to "admit" anything! What's to "admit"?
I game, I eat, and I use a PC. I don't go around telling people about any of the three, unless they ask me about it. I knew one guy who was always asking me about PCs, so we always talked computers, any time I saw him... With the one firend that games, D&D always comes up, after the wife & kids, and his business. Even though MOST people eat, I don't usually discuss food, nor my eating habits, with any of them...
I don't "admit" to gaming any more than I "admit" to eating or computing. If someone is interested enough to ask, and cares to discuss it, we can converse about it. If not, we will generally discuss something else of mutual interest.