Any discipline of model aircraft approved by the AMA may be flown and it is not uncommon to see everything from micro-electric foamies to gas-powered 1/4 scale airplanes, sailplanes, helicopters, and even the occasional 'lawnmower' gracing the skies over our field.
As is typical of most model aviation enthusiasts, the pilots are courteous, friendly, and willing to help and answer questions to each other and newcomers.