We, Tenshinkai Aikido under Sensei Phong, don't have "beginner classes" per say. We all train on the same mat at the same time. We do tend to train (pair off) by skill level so that we can take and give the waza at different levels. Most of us are glad to work with the "beginners" because we learn so much. IMHO, when you can take the fall and when you ar open to learn, others will be glad to welcome you in the training.