Best of both worlds
Ha, I definitely slip sometimes when I'm riding a Citibike around town after riding with clips for a while on my own bikes. On my commuter bike I have "hybrid" pedals, spd on one side, flat on the other. It's the best of both worlds because sometimes I need my sneakers when I get where I'm going and I'm not packing extra shoes. I recommend them! They're like $50 at REI and you can find cheaper versions on Amazon. Try looking for "commuter pedals"...and be careful out there.